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[Q] I727 in Vodafone.de, 3G strong signal but no call in/out no data flow

Hi guys,
I have a i727 skyrocket use in Germany. (unlock phone)
The network provider is Vodafone.de.
The phone works fine if you only use it in 2G network both call and data. (stock rom by using *#2263# or *#*#4636#*#*, CM9 rom by select 2g only, or *#*#4636#*#*)
But when I turn it to 3g network, problem happened. (both in WCDMA only or WCDMA preferred)
It appears like, when you power on/restart the phone, at first you can see 4G (stock) or H+/H/3G (CM9) icon and the data arrows flash. At this period you can make calls or browse website. But after maybe 30 seconds or 1 minute, when 4G or H icon gets stable. Then you can’t make calls out and if you use another phone to call it, the voice tells you the number you called can not be connected. And also the data was stopped; the browse shows network problem/times out or the same kinds of notice.
Then I use “GSM Signal Monitoring”, try to find out some regular patterns. I found when the signal switch from one base station to another, at first the phone functions is ok, and later when the signal is stable, the phone dead, and maybe several minutes after, when the phone switch to another station, the phone function works again, then about 30 seconds later, dead again. But in all this periods the signal is quite good. (around -60~-80 dBm)
At first I think maybe is the problem about RADIO.
So I try to flash many different RADIOs (T989, T989D, I727R, I757M, I9210, I9210T, E120K, E120S both from stock 2.3 or 4.0 and both with or without RIP), but they all didn’t solve the problem.
And also I try different ROMs (stock 2.3, 4.0; I727R 2.3, 4.0; T989 4.0, CM9; CM10), and the combination with the radios above, but still didn’t work.
Then I noticed some threads about the fast dormancy, I have tried to turn the fast dormancy off or on. But still didn’t work.
Also I noticed about different 3G data forms (HSPA+, HSUPA, HSDPA, UTMS), then I used *#301279# on stock rom to fix the 3g data form in only one kind or only use UTMS, but still didn’t work.
And later I found it is not about the data connection, it is only about the 3G network no matter about the data is on or off, when you switched to WCDMA, then, when the signal stable, you can’t make calls out or receive calls in, and even the signal bar seems great from the begin to the end.Another thing is if you making a call at the first “alive” period, then before you hang up the phone, it all works. Also if you use some online radio software keep the data flow, and the phone will not “dead”, only when the phone is idle, and later after sometime, the signal “dead”.
And the SIM card works fine in other phones in 3G network.
I have tried this in my home and office. In the office the signal always switched to different stations, so it looks a little better. But at home, the signal always stays in one or two stations, so it much easier to see when signal stable, the phone dead.
This problem confused me already 1 month, I tried everything I found and everything I can image. But everything didn’t work. At this moment, I only can use it under 2G networks.:crying::crying::crying:
I am sorry about my English; I try to explain these clearly.
Really hope someone can help me.

tjxboy said:
Hi guys,
I have a i727 skyrocket use in Germany. (unlock phone)
The network provider is Vodafone.de.
The phone works fine if you only use it in 2G network both call and data. (stock rom by using *#2263# or *#*#4636#*#*, CM9 rom by select 2g only, or *#*#4636#*#*)
But when I turn it to 3g network, problem happened. (both in WCDMA only or WCDMA preferred)
It appears like, when you power on/restart the phone, at first you can see 4G (stock) or H+/H/3G (CM9) icon and the data arrows flash. At this period you can make calls or browse website. But after maybe 30 seconds or 1 minute, when 4G or H icon gets stable. Then you can’t make calls out and if you use another phone to call it, the voice tells you the number you called can not be connected. And also the data was stopped; the browse shows network problem/times out or the same kinds of notice.
Then I use “GSM Signal Monitoring”, try to find out some regular patterns. I found when the signal switch from one base station to another, at first the phone functions is ok, and later when the signal is stable, the phone dead, and maybe several minutes after, when the phone switch to another station, the phone function works again, then about 30 seconds later, dead again. But in all this periods the signal is quite good. (around -60~-80 dBm)
At first I think maybe is the problem about RADIO.
So I try to flash many different RADIOs (T989, T989D, I727R, I757M, I9210, I9210T, E120K, E120S both from stock 2.3 or 4.0 and both with or without RIP), but they all didn’t solve the problem.
And also I try different ROMs (stock 2.3, 4.0; I727R 2.3, 4.0; T989 4.0, CM9; CM10), and the combination with the radios above, but still didn’t work.
Then I noticed some threads about the fast dormancy, I have tried to turn the fast dormancy off or on. But still didn’t work.
Also I noticed about different 3G data forms (HSPA+, HSUPA, HSDPA, UTMS), then I used *#301279# on stock rom to fix the 3g data form in only one kind or only use UTMS, but still didn’t work.
And later I found it is not about the data connection, it is only about the 3G network no matter about the data is on or off, when you switched to WCDMA, then, when the signal stable, you can’t make calls out or receive calls in, and even the signal bar seems great from the begin to the end.Another thing is if you making a call at the first “alive” period, then before you hang up the phone, it all works. Also if you use some online radio software keep the data flow, and the phone will not “dead”, only when the phone is idle, and later after sometime, the signal “dead”.
And the SIM card works fine in other phones in 3G network.
I have tried this in my home and office. In the office the signal always switched to different stations, so it looks a little better. But at home, the signal always stays in one or two stations, so it much easier to see when signal stable, the phone dead.
This problem confused me already 1 month, I tried everything I found and everything I can image. But everything didn’t work. At this moment, I only can use it under 2G networks.:crying::crying::crying:
I am sorry about my English; I try to explain these clearly.
Really hope someone can help me.
Click to expand...
Click to collapse
Why are u flashing radios for other phones???? That cud be ur problem right there.....try flashing a modem/radio for the i727 skyrocket
Edit: try flashing one of these radios for the SKYROCKET.....if that dnt work u may need to warranty ur phone out and get it replaced.
http://forum.xda-developers.com/showthread.php?t=1785999
Sent from my SGH-I727 using xda app-developers app

jyazzie110 said:
Why are u flashing radios for other phones???? That cud be ur problem right there.....try flashing a modem/radio for the i727 skyrocket
Sent from my SGH-I727 using xda app-developers app
Click to expand...
Click to collapse
because from the begining the original rom and radio have this problem,
then i have to try some other radios,
hope may solve this problem.
but neither the stock nor other ROM/RIDAO works. ............

jyazzie110 said:
Why are u flashing radios for other phones???? That cud be ur problem right there.....try flashing a modem/radio for the i727 skyrocket
Edit: try flashing one of these radios for the SKYROCKET.....if that dnt work u may need to warranty ur phone out and get it replaced.
http://forum.xda-developers.com/showthread.php?t=1785999
Sent from my SGH-I727 using xda app-developers app
Click to expand...
Click to collapse
Thanks for your help.
I have already tried most of them in this thread before.
nothing changed..T_T

tjxboy said:
Thanks for your help.
I have already tried most of them in this thread before.
nothing changed..T_T
Click to expand...
Click to collapse
I did the same as you, tried a lot of rom/kernel/radio combination without any luck.
Im not in US too, and I notice something that when it happens the network type changes from HSPDA to Unknown, but my carrier ID still there.
I Think that is happening maybe because I don't have a LTE signal here and the phone tries to connect to something in that band frequency and it somehow "hear" something in that frequency then lock it up there.
I notice that if i got into the radio menu *#2263* ( depending on the rom u r using) and set it to be just gsm. I will always get calls and data, but in eDGE speed and it sucks... If i set it to WCDMA only it eventually get signal drops. And the last choice is that Auto mode that I think got the LTE enable. I think if we could select the WCDMA preferred/ GSM option of the radio i727ruxfl3 it would solve our problems, but it appears to be an invalid solution.
Ive been looking around to learn how to change the radio code but no lucky yet...

filipeangelo said:
I did the same as you, tried a lot of rom/kernel/radio combination without any luck.
Im not in US too, and I notice something that when it happens the network type changes from HSPDA to Unknown, but my carrier ID still there.
I Think that is happening maybe because I don't have a LTE signal here and the phone tries to connect to something in that band frequency and it somehow "hear" something in that frequency then lock it up there.
I notice that if i got into the radio menu *#2263* ( depending on the rom u r using) and set it to be just gsm. I will always get calls and data, but in eDGE speed and it sucks... If i set it to WCDMA only it eventually get signal drops. And the last choice is that Auto mode that I think got the LTE enable. I think if we could select the WCDMA preferred/ GSM option of the radio i727ruxfl3 it would solve our problems, but it appears to be an invalid solution.
Ive been looking around to learn how to change the radio code but no lucky yet...
Click to expand...
Click to collapse
In my case, the network type changes from HSPA+:15-->UTMS:3-->HSPA:11, then stop changing. If you send some internet request immediately after this, the network type will change back to UTMS:3--> HSPA+:15 again. But If you do nothing, after some time, the network fully dead.....Only when the phone switches to anther station, the network type changes again. Because I noticed this, I tried to fixed the network type in HSDPA:9 or UTMS:3, but the network still will die when the signal stable.
In my place, we do have a LTE network, but the frequency here is different from north america. And my problem is only in WCDMA, so I think it is not related with LTE network.
As I said, it works well in 2G network both in GPRS and EDGE; and in 3G, the signal is also strong, nearly full bar.
Maybe my case is a little different from yours.
But in your case, I think you can use *#*#4636#*#*, to lock the signal in WCDMA only or WCDMA preferred, it is the same as you use *#2263#, only the words is a little different.
WCDMA only in *#*#4636#*#* = WCDMA preference in *#2263#
WCDMA preference in *#*#4636#*#* = WCDMA/GSM preference in *#2263#
You can try to test whether your theory is right.

tjxboy said:
In my case, the network type changes from HSPA+:15-->UTMS:3-->HSPA:11, then stop changing. If you send some internet request immediately after this, the network type will change back to UTMS:3--> HSPA+:15 again. But If you do nothing, after some time, the network fully dead.....Only when the phone switches to anther station, the network type changes again. Because I noticed this, I tried to fixed the network type in HSDPA:9 or UTMS:3, but the network still will die when the signal stable.
In my place, we do have a LTE network, but the frequency here is different from north america. And my problem is only in WCDMA, so I think it is not related with LTE network.
As I said, it works well in 2G network both in GPRS and EDGE; and in 3G, the signal is also strong, nearly full bar.
Maybe my case is a little different from yours.
But in your case, I think you can use *#*#4636#*#*, to lock the signal in WCDMA only or WCDMA preferred, it is the same as you use *#2263#, only the words is a little different.
WCDMA only in *#*#4636#*#* = WCDMA preference in *#2263#
WCDMA preference in *#*#4636#*#* = WCDMA/GSM preference in *#2263#
You can try to test whether your theory is right.
Click to expand...
Click to collapse
Im using SuperHeavy JB rom and Blaze LF4 radio that is the best combination i got so far. I still get network lockouts but its not as common as other combos. My theory is that the radio connects to some band then it loses the signal and somehow it doesn't detect that the signal is lost.
Cause I was looking at the *#*#4636#*#* and the uplink still sending data, but it doesn't get a response back.

filipeangelo said:
Im using SuperHeavy JB rom and Blaze LF4 radio that is the best combination i got so far. I still get network lockouts but its not as common as other combos. My theory is that the radio connects to some band then it loses the signal and somehow it doesn't detect that the signal is lost.
Cause I was looking at the *#*#4636#*#* and the uplink still sending data, but it doesn't get a response back.
Click to expand...
Click to collapse
Yes, I am quite agree with your theory.
I noticed the same thing as you mentioned,
When the signal is dead,
you still can see the phone send some request to the network,
but no respond.
So I think it maybe influenced by the fast dormancy.
Maybe the phone and the network have some problem in fast dormancy policy.
Then I use the way which was described in the forum, add some information into the database.
But unluckly, still didn't work.
I will try your combinations to see if something changes.
Thanks a lot.

filipeangelo said:
Im using SuperHeavy JB rom and Blaze LF4 radio that is the best combination i got so far. I still get network lockouts but its not as common as other combos. My theory is that the radio connects to some band then it loses the signal and somehow it doesn't detect that the signal is lost.
Cause I was looking at the *#*#4636#*#* and the uplink still sending data, but it doesn't get a response back.
Click to expand...
Click to collapse
report:
I just tried this combination, SuperHeavy rom (V6.0SR, based on CM10), and blaze 4g LF4 radio. But still the same, the signal dead after the signal is stable. T_T
You can see a H on the bar, and the signal if full.
But when you use "ping" in *#*#4636#*#*, the result is "Fail:IP addr not reachable"
...................................

Here are two screenshots.
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The first is when the signal is satble, have a "H" icon on the bar and the network connection is "stop".
At this moment, you can see good signal, but you can't make any calls, and no data.
The second is just when the phone switched to another base station, have a "H+" icon, at the first short moment, everything works find.
But, several seconds later, the "H+" turns to "H", then, every communication down.

tjxboy said:
Here are two screenshots.
The first is when the signal is satble, have a "H" icon on the bar and the network connection is "stop".
At this moment, you can see good signal, but you can't make any calls, and no data.
The second is just when the phone switched to another base station, have a "H+" icon, at the first short moment, everything works find.
But, several seconds later, the "H+" turns to "H", then, every communication down.
Click to expand...
Click to collapse
I wipe everything and started a new installation. The rom version is a gingerbread one. I thought what the heck i will do the downgrade, better a working phone with an old OS the a great OS with non working phone.
I tried the Nexusmod 4.3.1 with the radio i727UCLA3. Its been just 4hrs tethering but so far so good. Give it a try.
Another thing is looking down the web i found that more ppl are having this issue, but they are using other devices such as nexus,and they fixed by simple softwares updates, I might not be the same problem but it gave me hope that it could be software related not hardware as I ve started to suspect.

tjxboy said:
Here are two screenshots.
The first is when the signal is satble, have a "H" icon on the bar and the network connection is "stop".
At this moment, you can see good signal, but you can't make any calls, and no data.
The second is just when the phone switched to another base station, have a "H+" icon, at the first short moment, everything works find.
But, several seconds later, the "H+" turns to "H", then, every communication down.
Click to expand...
Click to collapse
Hey Im trying a new thing, I took out the SD card and changed the SIM card. I have installed the CM JB 4.1.2 nightly,after that i let it settle for 10min before I do anything in the room. Well since yesterday i got data and calls whenever I want.
You should try.

filipeangelo said:
I wipe everything and started a new installation. The rom version is a gingerbread one. I thought what the heck i will do the downgrade, better a working phone with an old OS the a great OS with non working phone.
I tried the Nexusmod 4.3.1 with the radio i727UCLA3. Its been just 4hrs tethering but so far so good. Give it a try.
Another thing is looking down the web i found that more ppl are having this issue, but they are using other devices such as nexus,and they fixed by simple softwares updates, I might not be the same problem but it gave me hope that it could be software related not hardware as I ve started to suspect.
Click to expand...
Click to collapse
Thanks.
I tried the same you said, still the same problem....
T_T

filipeangelo said:
Hey Im trying a new thing, I took out the SD card and changed the SIM card. I have installed the CM JB 4.1.2 nightly,after that i let it settle for 10min before I do anything in the room. Well since yesterday i got data and calls whenever I want.
You should try.
Click to expand...
Click to collapse
The same I tried, took out SIM card (no install TF card), install clean ROM, restart, let it settle for half an hour, then, insert SIM card.
Unfortunately, still the same.
But I found some thing, when I use my frineds' SIM card which from other network provider (O2, E-plus in Germany), and the phone in their 3g network seems works well.....
So maybe this only about the phone and the vodafone network, maybe some compatible problem. It is really disappointed.
I contacted with vodafone company but no reply yet.
I think maybe the only way I can use this phone properly is to change to another network. T_T

Can't get connection to ANY carrier

Hi! I'm having some mayor problems with my OnePlus One.
For some time I have had problems getting calls and sms when using 4G but it seemed to be a problem with my carrier but 2 weeks ago I dropped my phone and the screen broke so I bought a new screen and replaced it. After that the connection to my carrier dropped randomly and now after trying to fix it in different ways I can't get any connection at all with any carrier !
What I have tried so far:
Factory reset
Reinstalled CM
Put paper under the sim for tighter fit
Turned the radio off and on and restart phone
Change pin code
Replace sim-card
Tried different carriers on my phone (my simcard worked on other phones so it is the OPO that is the problem)
Total restore by fastboot-flashing
Installed OxigenOS 2
Tried all modems from the modem collection on CM and Oxigen.
Retyped the APN by hand
Opened the phone again and checked that all cables are connected well
Tried manualy connect to my carrier under Network Operators
For a short time of maximum 10 seconds I got a 4G connection twice in now 3 days of trying but then it stops working again. It feels like a hardware problem BUT I can see a lot of different carriers under Network Operators but when trying to connect it loads for ever and then says "Can't register to your carrier". I called my carrier and thay said nothing was wrong from their end and when I tried on other phones it worked flawlessly.
I'm really out of ideas now and I don't know where to go from here. I really hope someone of you knows that might be the problem!
Thank you so much!

If imei present you can try mobile phone exchange offer on flip kart like online stores. When this happened to my phone I did it , very easy.

Sometimes opo dont search available network or wont register on any network.
Sulution: go to access point and reset it to default first then go to network and try to search for network n if ur able to search then try ro register manually and if it does not work then go to dialer and dial *#*#4636#*#* then click phone info and select the lte/gsm ato prl mode and then click turn radio off and again tuen it onn then smsc refresh and update ( i dnt remember it correctly) if that dnt help then ur network antena is damaged

G930W8 Rebooting several times a day

I have a G930W8 that was supposedly brand new, running stock 7.0 with TWRP and SuperSU. It reboots 1-3 times a day at random times while I'm not using the phone.
I've factory reset it and only loaded a few apps on it, cleared davlik and cache, reloaded the stock rom from odin - it is still happening. Does anyone have any tips on how to diagnose? I've tried looking through the last_kmsg files but I can't make much sense out o them - should they be able to identify the cause for the crashing? I'm trying to determine if it's a hardware issue or something else.
I did have over 40k sms / mms messages on there that I'm clearing out now, would that cause spontaneous reboots?
Thanks for any help.

slim26 said:
I have a G930W8 that was supposedly brand new, running stock 7.0 with TWRP and SuperSU. It reboots 1-3 times a day at random times while I'm not using the phone.
I've factory reset it and only loaded a few apps on it, cleared davlik and cache, reloaded the stock rom from odin - it is still happening. Does anyone have any tips on how to diagnose? I've tried looking through the last_kmsg files but I can't make much sense out o them - should they be able to identify the cause for the crashing? I'm trying to determine if it's a hardware issue or something else.
I did have over 40k sms / mms messages on there that I'm clearing out now, would that cause spontaneous reboots?
Thanks for any help.
Click to expand...
Click to collapse
40k SMS could cause problems, but you said you factory reset, that would have cleared them

*Detection* said:
40k SMS could cause problems, but you said you factory reset, that would have cleared them
Click to expand...
Click to collapse
Thanks. I reloaded them after the reset with a backup and restore app. I changed the setting to only keep 1k messages on there now and will monitor.
Hopefully that was the issue, but really wondering if I will be able to make sense of the last_kmsg logs at all.
If the smaller quantity of messages on there doesn't resolve the issue, I'll try runnning it without an sdcard for a day. I initially suspected a problem with the sdcard, formatted it since - formatting did not resolve the issue.

Am I looking in the right spot? Since clearing out my sms messages, it still crashes on me every few hours. I pulled the last two kmsg files from the last two reboots. Is there anyone that can let me know if I'm looking at the right files to diagnose?
Is this area of the file telling me anything useful?
{
"lightbox_close": "Close",
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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"lightbox_stop_slideshow": "Stop slideshow",
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"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Any help is greatly appreciated.

UPDATE:
I left the country for 8 days and was using a Costa Rica SIM card (and various different wifi connections) - the phone did not reboot a single time in 8 days.
On my first day back home, after putting my AT&T SIM card back in (this is a new card that I just got a few weeks ago from AT&T), and being connected to my home wifi - it has started spontaneously rebooting again. I've reset the network connections, it has not helped.
I'm torn between whether I got a bad SIM card that could be causing the reboots, or if it is something wrong with the wifi and my home network, or a combination of both. Many of the reboots seem to occur when I switch from LTE to wifi. It is a very difficult issue to reproduce.
Any suggestions on how to isolate the issue, any settings to check, or if it sounds like a radio or hardware issue?
Thanks.

slim26 said:
UPDATE:
I left the country for 8 days and was using a Costa Rica SIM card (and various different wifi connections) - the phone did not reboot a single time in 8 days.
On my first day back home, after putting my AT&T SIM card back in (this is a new card that I just got a few weeks ago from AT&T), and being connected to my home wifi - it has started spontaneously rebooting again. I've reset the network connections, it has not helped.
I'm torn between whether I got a bad SIM card that could be causing the reboots, or if it is something wrong with the wifi and my home network, or a combination of both. Many of the reboots seem to occur when I switch from LTE to wifi. It is a very difficult issue to reproduce.
Any suggestions on how to isolate the issue, any settings to check, or if it sounds like a radio or hardware issue?
Thanks.
Click to expand...
Click to collapse
Yea, disable WiFi for another week, if it stops, it's the wifi, if it still crashes it's the SIM

Thanks. It just crashed again with wifi turned off, so that rules out that.
So it seems likely either a bad SIM, or the phone is having issues with the LTE network. I notice the network switches from LTE to LTE+ often.
It would be odd if it is a bad SIM as it is only a few weeks old, but I'll swap it out with AT&T.
Knowing that wifi is not an issue, any other suggestions other than a bad SIM? I'm also wondering if maybe the sim tray does not hold the hard well and it's loose.
Thanks for the support.

slim26 said:
Thanks. It just crashed again with wifi turned off, so that rules out that.
So it seems likely either a bad SIM, or the phone is having issues with the LTE network. I notice the network switches from LTE to LTE+ often.
It would be odd if it is a bad SIM as it is only a few weeks old, but I'll swap it out with AT&T.
Knowing that wifi is not an issue, any other suggestions other than a bad SIM? I'm also wondering if maybe the sim tray does not hold the hard well and it's loose.
Thanks for the support.
Click to expand...
Click to collapse
Just keep with your elimination technique, looks like you're almost down to the cause, be it SIM or LTE/+
Switch SIMs, if it doesn't crash when switching between LTE and + then ask your carrier for a new SIM

Couldn't a log file of some sort be run to trap/identify the app and error?

ok i had this problem when buy my s7 10 months ago with stock firmware. all ways reset/on/off/clear cach/format....noting useful so i tried to update but no new update so i force to download whole new firmware with another csc from another region( i downloaded rom of UK) and flashed to phone with Odin. and Wow problem is gone....finish...end .
maybe useful for u.

lg stylo 5 mode 22, no network, no radio, wifi only

I'm having trouble with my LG stylo 5 well, two of them, one, on start up, froze on LG logo, so i did the power +vol. down, it turned off, and won't come back on.. won't charge battery, nothing, I took battery out, charged it, tested plug, it's not charging when plugged it to. charger, I held down buttons with battery out to drain all power, put back together, still nothing.. its on tracfone
the 2nd stylo 5, I think I'd bad updo, as I lost network connection, it says mode 22 in network settings, won't let me change them to lte, or auto, says turn off airplane mode to make call, and no radio..... the dial pad 4636, don't let me change anything either, it's just stuck, but works on wifi, it's reading Sim, as it says phone number, and Sim number in about phone, just.. no service... I dont have computer access, so if I could somehow download a older android version, im on Android 10, newest update now.. to a SD card, or memory, and upload somehow, to reflash,.. id really like to knkw how.. ive never done any software mods, so I'd need a sep by step play please, these are my only phones, and I live deep in mountains, and really need to fix one of them,.. the 2nd phone is on metro pcs, and is unlocked, but other Sims say same thing, need help, thanks

Jeremy619 said:
I'm having trouble with my LG stylo 5 well, two of them, one, on start up, froze on LG logo, so i did the power +vol. down, it turned off, and won't come back on.. won't charge battery, nothing, I took battery out, charged it, tested plug, it's not charging when plugged it to. charger, I held down buttons with battery out to drain all power, put back together, still nothing.. its on tracfone
the 2nd stylo 5, I think I'd bad updo, as I lost network connection, it says mode 22 in network settings, won't let me change them to lte, or auto, says turn off airplane mode to make call, and no radio..... the dial pad 4636, don't let me change anything either, it's just stuck, but works on wifi, it's reading Sim, as it says phone number, and Sim number in about phone, just.. no service... I dont have computer access, so if I could somehow download a older android version, im on Android 10, newest update now.. to a SD card, or memory, and upload somehow, to reflash,.. id really like to knkw how.. ive never done any software mods, so I'd need a sep by step play please, these are my only phones, and I live deep in mountains, and really need to fix one of them,.. the 2nd phone is on metro pcs, and is unlocked, but other Sims say same thing, need help, thanks
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Click to collapse
Can you tell us how the issues started? Did this happen on its own or did this happen because you tried modifying the devices and failed?

Droidriven said:
Can you tell us how the issues started? Did this happen on its own or did this happen because you tried modifying the devices and failed?
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Click to collapse
yes, thanks for responding, as the description says, I have not done any mods at all, both just acted up out of nowhere

Droidriven said:
Can you tell us how the issues started? Did this happen on its own or did this happen because you tried modifying the devices and failed?
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Click to collapse
I don't know how to do that, i was having trouble posting at all, and it said I had to pick somebody, I have done no mods, just normal use, messed up out of nowhere, I've seen other threads saying same thing, but no one has responded other than.. MI e too

Droidriven said:
Can you tell us how the issues started? Did this happen on its own or did this happen because you tried modifying the devices and failed?
Click to expand...
Click to collapse
no, I did nothing, it's bone stalk, auto updates, just acted up out of nowhere

Droidriven said:
Can you tell us how the issues started? Did this happen on its own or did this happen because you tried modifying the devices and failed?
Click to expand...
Click to collapse
yes, thank you, no modes at all, just happened out of nowhere, I've seen other threads asking for help on some issues, but no one responded, other than... me too..... I'm guessing the system updates messed them up.. bugs???

Jeremy619 said:
yes, thank you, no modes at all, just happened out of nowhere, I've seen other threads asking for help on some issues, but no one responded, other than... me too..... I'm guessing the system updates messed them up.. bugs???
Click to expand...
Click to collapse
You don't have a computer available, I'm not certain exactly what your issue is or exactly what you need to do to fix it, but I can definitely tell you that it will require a computer to fix the issue.

Droidriven said:
You don't have a computer available, I'm not certain exactly what your issue is or exactly what you need to do to fix it, but I can definitely tell you that it will require a computer to fix the issue.
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Click to collapse
OK, thanks, I figured it was a bad update, and I should install a older android version, android pie, (9?, and not let it up date to Android 10 again??, but I don't k kw how to do that

Jeremy619 said:
OK, thanks, I figured it was a bad update, and I should install a older android version, android pie, (9?, and not let it up date to Android 10 again??, but I don't k kw how to do that
Click to expand...
Click to collapse
Some devices can't downgrade the android version. I'm not sure if your device is one of them though. If it is, you won't be able to go back to android 9 from 10.
Can you look in system settings and verify that it still shows your IMEI number? If it is not showing or if it shows all zeroes, the IMEI got wiped out during the update. In such case, you may have to restore the IMEI or refresh your firmware via PC. Restoring IMEI or flashing firmware will require a PC.

Droidriven said:
Some devices can't downgrade the android version. I'm not sure if your device is one of them though. If it is, you won't be able to go back to android 9 from 10.
Can you look in system settings and verify that it still shows your IMEI number? If it is not showing or if it shows all zeroes, the IMEI got wiped out during the update. In such case, you may have to restore the IMEI or refresh your firmware via PC. Restoring IMEI or flashing firmware will require a PC.
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Click to collapse
yes, I have a imei number, it don't show null, it shows my phone number to every Sim I put in, but says disconnected, no radio, turn off airplane mode, no service, network unknown,.. and refusing to let me change network mode to lte or 4g, just says in blue lettering... preferred network mode 22, but every Sim I put in, it auto adjust the apns, to that Sim.. it's a Metro PCS phone, but GSM unlocked
iI just figured downgrading back to android 9, would sorta be like flashing it, as I don't have computer access

Jeremy619 said:
yes, I have a imei number, it don't show null, it shows my phone number to every Sim I put in, but says disconnected, no radio, turn off airplane mode, no service, network unknown,.. and refusing to let me change network mode to lte or 4g, just says in blue lettering... preferred network mode 22, but every Sim I put in, it auto adjust the apns, to that Sim.. it's a Metro PCS phone, but GSM unlocked
iI just figured downgrading back to android 9, would sorta be like flashing it, as I don't have computer access
Click to expand...
Click to collapse
The APN is probably saved on the SIM itself. It isn't allowing you to manually change the APN in settings?

Droidriven said:
The APN is probably saved on the SIM itself. It isn't allowing you to manually change the APN in settings? es, it will allow me to manually add apn settings, but it doesn't change anything, in network settings the option to manually change it does pop up, with 3 choices.. Auto, 4g, auto 3 g.. Etc, but the blue network mode 22 stays,.. Did talk to best buys, geek squad, and one tech said if it's in blue, what happened was when the new update to 5g was sent out it was supposed to wipe out the 3g options from phones, and some phones didn't take it so well, but they say can be fixed by flashing it.. I'm still unsure what that means, and would still need to do it with a SD card, or male to male cord to another phone.. If it works like that?, I was hoping for a new update.. But believe the phone probably isn't receiving signal at all now, as some app even on wifi say to turn on wifi.. Or data..
Click to expand...
Click to collapse

Jeremy619 said:
No, it does pop up, with 3 choices.. Auto, 4g, auto 3 g.. Etc, but the blue network mode 22 stays,.. Did talk to best buys, geek squad, and one tech said if it's in blue, what happened was when the new update to 5g was sent out it was supposed to wipe out the 3g options from phones, and some phones didn't take it so well, but they say can be fixed by flashing it.. I'm still unsure what that means, and would still need to do it with a SD card, or male to male cord to another phone.. If it works like that?, I was hoping for a new update.. But believe the phone probably isn't receiving signal at all now, as some app even on wifi say to turn on wifi.. Or data..
Click to expand...
Click to collapse
If there is a public library near you or some other place that has computers available for public use, you can download your device drivers, your stock firmware file and your device's compatible flashing software then put them on a USB flash drive and use the PC at the public place to install your firmware.

Jeremy619 said:
No, it does pop up, with 3 choices.. Auto, 4g, auto 3 g.. Etc, but the blue network mode 22 stays,.. Did talk to best buys, geek squad, and one tech said if it's in blue, what happened was when the new update to 5g was sent out it was supposed to wipe out the 3g options from phones, and some phones didn't take it so well, but they say can be fixed by flashing it.. I'm still unsure what that means, and would still need to do it with a SD card, or male to male cord to another phone.. If it works like that?, I was hoping for a new update.. But believe the phone probably isn't receiving signal at all now, as some app even on wifi say to turn on wifi.. O
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bro, i have the same problem but with an lg g8x, did you get any solution?
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Joelp1 said:
bro, i have the same problem but with an lg g8x, did you get any solution?
View attachment 5524125
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no.. as far as ive been able to find out, from best buy, is it was a update to remove 3g options from phones.. and i guess reflashing it will fix it.. but i havent been able to take ot anywhere, please let me onkw if you fix yours

Hey man am kinda having same issue on my LG V50 (V500N30e SKT_KR) was on V500N30c SKT_KR and all was ok, till I performed am update with file size of about 245mb which took me to current version of the firmware (V500N30e) though after the update it didn't show immediately but after some 6days I noticed am unable to use mobile data completely even text and calls aren't working though with mobile data toggle on am able to select 5G/4G/3G/2G mode but doesn't do anything as it returns to being idle again. Any fix am this yet for you. (am yet to flash previous build back).

BOBxibyt said:
Hey man am kinda having same issue on my LG V50 (V500N30e SKT_KR) was on V500N30c SKT_KR and all was ok, till I performed am update with file size of about 245mb which took me to current version of the firmware (V500N30e) though after the update it didn't show immediately but after some 6days I noticed am unable to use mobile data completely even text and calls aren't working though with mobile data toggle on am able to select 5G/4G/3G/2G mode but doesn't do anything as it returns to being idle again. Any fix am this yet for you. (am yet to flash previous build back).
Click to expand...
Click to collapse
I've seen a lot on no signal stuff, I think everything can be adjusted to work except this network mode 22 in blue, if you try to make a call, does it say to turn off airplane mode like mine?, have you done the dial pad thing, *#*#4636#*#*?, the top option, in there, my network says unknown, radio off,, here, most people can manually change the network settings to whatever they needs, GSM only, CDMA only, gsm/CDMA automatic etc, and this normally fixes most issues, I have a bad update I think, that was meant to remove 2/3g options out of my system, and messed everything up, as I have x2 stylo 5s and both stopped working, one just froze on LG symbol, and he other lost network radio signal, I tried to hold down power and vol down on other one, and it turned off, and never came back on, i've tried to unhook battery, and drain power... nothing, I switch batteries, etc, nothing, I have not been able to fix either phone, I sence bought a LG k31, and 3 days ago, it started ghost touching, scrolling on its own, clicking on stuff, I'm using it as a hot spot, to power the stylo 5, I don't mess with settings, add anything, drop em, just normal stuff, I dnt know what's going on, but I'll cave man it it before being a apple guy!

Jeremy619 said:
I've seen a lot on no signal stuff, I think everything can be adjusted to work except this network mode 22 in blue, if you try to make a call, does it say to turn off airplane mode like mine?, have you done the dial pad thing, *#*#4636#*#*?, the top option, in there, my network says unknown, radio off,, here, most people can manually change the network settings to whatever they needs, GSM only, CDMA only, gsm/CDMA automatic etc, and this normally fixes most issues, I have a bad update I think, that was meant to remove 2/3g options out of my system, and messed everything up, as I have x2 stylo 5s and both stopped working, one just froze on LG symbol, and he other lost network radio signal, I tried to hold down power and vol down on other one, and it turned off, and never came back on, i've tried to unhook battery, and drain power... nothing, I switch batteries, etc, nothing, I have not been able to fix either phone, I sence bought a LG k31, and 3 days ago, it started ghost touching, scrolling on its own, clicking on stuff, I'm using it as a hot spot, to power the stylo 5, I don't mess with settings, add anything, drop em, just normal stuff, I dnt know what's going on, but I'll cave man it it before being a apple guy!
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Click to collapse
Seems LG messes things up from their end alot and ships it to us without fixing any

BOBxibyt said:
Seems LG messes things up from their end alot and ships it to us without fixing any
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Click to collapse
yes, and I just heard lg isn't making phones anymore, and are not supporting their old ones

I got the solution,
I have been using my lg since 2020, it came with android 9 it was perfectly fine till android 11, in july 2022 i updated it to 12 since i got the update, but after the update it made it worse so laggy unresponsive home buttons and back button top bar swiping completely went into chaos, due to this i downgraded to android 9 it was well again but no network in settings it showed network mode 22 so i tried to flash android 10 same issue and then i flashed it back to 12 everything went well network came back and even the phone works so fine till now, network gone like network mod : 22 means we have taken our device too back this is the issue flash with stock rom it will be fine.

Question Signal problem only resolving after a restart

im facing a problem, i use 2 sim cards so whenever im in an area of bad coverage i completely lose the signal, the problem is when i went to a good coverage area, the signal is staying dead till i restart my phone. Airplane mode does nothing only restarting or if im just using one sim card (which is not an option unfortunately)

did you try to check the " Automatically select network " under mobile networks in the settings app ?
try to turn it on , or try to select your network manually

m.yasser4505 said:
im facing a problem, i use 2 sim cards so whenever im in an area of bad coverage i completely lose the signal, the problem is when i went to a good coverage area, the signal is staying dead till i restart my phone. Airplane mode does nothing only restarting or if im just using one sim card (which is not an option unfortunately)
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Click to collapse
did you check if the problems happens when only ONE sim is installed?
are BOTH simcards of new generation? (I don't mean to support 5G but to be manufactured the same period).
It's useless to use simcard that is more than 5 years old. They cannot communicate with all new signal standards.

ag6ag said:
did you try to check the " Automatically select network " under mobile networks in the settings app ?
try to turn it on , or try to select your network manually
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Click to collapse
It's already on by default, disabled it then tried to choose manually it keeps saying something like can't connect

gorillaz_gr said:
did you check if the problems happens when only ONE sim is installed?
are BOTH simcards of new generation? (I don't mean to support 5G but to be manufactured the same period).
It's useless to use simcard that is more than 5 years old. They cannot communicate with all new signal standards.
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Click to collapse
it works fine if i just have one sim card
yes they are ( one is like 2 years old and the other is ~3 years )

Does it make a difference if you use Sim card A or B when using only one sim card or do both of them run like a charm in single mode? Did you try to combinate sim a or b with a totally different simcard (from a fiend for example, or change the ports for A/B) ... did it ever function in the now used/wanted combination? Sorry for my bad english...

borisku said:
Does it make a difference if you use Sim card A or B when using only one sim card or do both of them run like a charm in single mode? Did you try to combinate sim a or b with a totally different simcard (from a fiend for example, or change the ports for A/B) ... did it ever function in the now used/wanted combination? Sorry for my bad english
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Click to collapse
your english is better than mine ... ill try swapping the ports and inform you back .. tysm brother

m.yasser4505 said:
your english is better than mine ... ill try swapping the ports and inform you back .. tysm brother
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What is your OS system? MIUI or custom ROMs?
Does the signal comes back if you change "Preferred network type" ? Like switching to 2G only, wait for 30 seconds, then prefer 3G, wait for 30 seconds, then prefer LTE/4G ?
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If you are in MIUI, you can also try forcing 2G only, 3G only LTE only as in following Xiaomi forum
https://c.mi.com/thread-2683781-1-0.html
This does not solve the problem, only some workaround to try to make your signal back without rebooting.
To solve the problem, report to Xiaomi or Poco. Or ask in the custom ROM thread if you are using custom ROMs.

try to check your network maybe they having their maintenance or you can use another sim if you have to check if it's still the same.

pl1992aw said:
What is your OS system? MIUI or custom ROMs?
Does the signal comes back if you change "Preferred network type" ? Like switching to 2G only, wait for 30 seconds, then prefer 3G, wait for 30 seconds, then prefer LTE/4G ?
If you are in MIUI, you can also try forcing 2G only, 3G only LTE only as in following Xiaomi forum
https://c.mi.com/thread-2683781-1-0.html
This does not solve the problem, only some workaround to try to make your signal back without rebooting.
To solve the problem, report to Xiaomi or Poco. Or ask in the custom ROM thread if you are using custom ROMs.
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Click to collapse
first of all thx for ur time trying to help out much appreciated . I just switched to Pixel Plus 12L like 3 days ago (was on ArrowOS 11 while i was facing this problem), however im not facing any signal issues so far with current rom so gonna wait and see

icodix said:
try to check your network maybe they having their maintenance or you can use another sim if you have to check if it's still the same.
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Click to collapse
we usually get informed whenever there's a maintenance or something, for the sim card i will wait and check if it needs to be changed since i switched to another rom n not having any issues so far, thx for the help brother

m.yasser4505 said:
we usually get informed whenever there's a maintenance or something, for the sim card i will wait and check if it needs to be changed since i switched to another rom n not having any issues so far, thx for the help brother
Click to expand...
Click to collapse
no prob