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[Q] wifi connection problem

i have a a850 lenovo smartphone, i have wifi connection problem since first time i bought, it can connect to wifi but have no internet connection.. but my other gadjet are perfectly connected with the same wifi. i tried claim warranty and the retailer tried to fix thing. but the prob still the same. do anyone have solution for this prob who experience the same???
sorry for my bad english.

First time hearing sth similar...
Rom?
WiFi icon status / color?
Browser / Apps?
Try this app:
https://play.google.com/store/apps/details?id=org.wahtod.wififixer

dzuhri1234 said:
i have a a850 lenovo smartphone, i have wifi connection problem since first time i bought, it can connect to wifi but have no internet connection.. but my other gadjet are perfectly connected with the same wifi. i tried claim warranty and the retailer tried to fix thing. but the prob still the same. do anyone have solution for this prob who experience the same???
sorry for my bad english.
Click to expand...
Click to collapse
Did you try to connect the phone on another router?

GreatApo said:
First time hearing sth similar...
Rom?
WiFi icon status / color?
Browser / Apps?
Try this app:
https://play.google.com/store/apps/details?id=org.wahtod.wififixer
Click to expand...
Click to collapse
I using rom s123..build in rom since first time i bought this phone.. sometime the wifi icon change to blue color when it can get connected to internet.. but only for few hours.. then change back to white color like limited access..when it change to white, i hv no internet connection.. i using normal android browser.. recently i install new rom.. try to settle this prob.but nothing change. Only the version change.. rom s123 ipgrade to rom s128.
Ill try your suggested apps and let you know later..

giorgoslouk said:
Did you try to connect the phone on another router?
Click to expand...
Click to collapse
Yes i tried..but still same..

dzuhri1234 said:
I using rom s123..build in rom since first time i bought this phone.. sometime the wifi icon change to blue color when it can get connected to internet.. but only for few hours.. then change back to white color like limited access..when it change to white, i hv no internet connection.. i using normal android browser.. recently i install new rom.. try to settle this prob.but nothing change. Only the version change.. rom s123 ipgrade to rom s128.
Ill try your suggested apps and let you know later..
Click to expand...
Click to collapse
So when it is blue you are connected to the router and you can access the internet right? This is what should happening...
I do not know why it disconnects... also try this, when it disconnects go to the wifis (in settings) and click the "two ways arrow" icon (bottom left), and then click cancel... some times i have to do that to connect
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GreatApo said:
So when it is blue you are connected to the router and you can access the internet right? This is what should happening...
I do not know why it disconnects... also try this, when it disconnects go to the wifis (in settings) and click the "two ways arrow" icon (bottom left), and then click cancel... some times i have to do that to connect
Click to expand...
Click to collapse
I tried your suggestion.. but the problem still the same... i did research about this lenovo phone wifi connection problem, but still have no solution for a850 phone.. do you have the same problem like mine? Any other solution?

dzuhri1234 said:
I tried your suggestion.. but the problem still the same... i did research about this lenovo phone wifi connection problem, but still have no solution for a850 phone.. do you have the same problem like mine? Any other solution?
Click to expand...
Click to collapse
No man sorry :/

I have the same problem

@ endres93, dzuhri1234
If i were you, i'd try another ROM.

giorgoslouk said:
@ endres93, dzuhri1234
If i were you, i'd try another ROM.
Click to expand...
Click to collapse
I've tried these: 123, 128 and am currently using the 116 I thought the best of the three put the same problem

endres93 said:
I've tried these: 123, 128 and am currently using the 116 I thought the best of the three put the same problem
Click to expand...
Click to collapse
Really strange.....
It must me a hardware problem after all.

giorgoslouk said:
Really strange.....
It must me a hardware problem after all.
Click to expand...
Click to collapse
Not a hardware problem
Just do the following
Remove location service for wifi and change wifi setting to always on

dzuhri1234 said:
i have a a850 lenovo smartphone, i have wifi connection problem since first time i bought, it can connect to wifi but have no internet connection.. but my other gadjet are perfectly connected with the same wifi. i tried claim warranty and the retailer tried to fix thing. but the prob still the same. do anyone have solution for this prob who experience the same???
sorry for my bad english.
Click to expand...
Click to collapse
Settings > WLAN > Advance > Keep WLAN on during sleep

dzuhri1234 said:
i have a a850 lenovo smartphone, i have wifi connection problem since first time i bought, it can connect to wifi but have no internet connection.. but my other gadjet are perfectly connected with the same wifi. i tried claim warranty and the retailer tried to fix thing. but the prob still the same. do anyone have solution for this prob who experience the same???
sorry for my bad english.
Click to expand...
Click to collapse
On connect view device receive the IP. If you do not receive or IP is inccorect, you can set the IP manually

I need help, I'm using sister's laptop for this. But anyways, my Lenovo A850 cannot connect to the wifi. But I had multiple problems before, that is from my charger not working properly, but we fixed it. After fixing I used it for a bit, and I just rebooted the system so my wifi connection will be fixed, but after rebooting my System UI stopped working for some weird reason. So I looked up the problem and I factory reset my phone, I had connection for 24 minutes sharp, and I lost that connection. How do I fix it? Everytime I forget the network and re-enter the password it says "Authenticating Fail." But it kept happening all over again, my father even made sure to pay the wifi. To make sure I'm not the only one who has the problem in the house I said to my sister if she can connect, which it did. HELP ME I CAN'T PLAY GAMES IN MY PHONE ANYMORE!!! P.S: Does the data connection work? But I do hope that you can respond quickly, I am really eager to use my phone. I haven't use it in a while.

Phone modem/radio dead?

Not sure if the phone radio is completely dead or not but I've lost all signals completely today. Nothing I do works.
If I go into Mobile Networks and choose Network Operators, the phone is able to scan for the networks and showed my correct carrier in the list. However I choose to register on it, it doesn't work. It just keeps scanning and doesn't register.
Tried flashing new ROM from scratch with new radios from CM and Oxygen (230 and 241) and neither works. Tried flashing via recovery and fastboot. Tried restoring from a working TWRP backup, still the same issue.
I took my SIM card out and tried on an older phone, works fine. Used another working SIM card on my OPO, still doesn't work. At this point, I think it could be a hardware issue with the phone. Only thing I'm confused about is why it's able to list the carriers in Network Operators and this was never an issue in the past. Also, it doesn't show a question mark in the signal bar so that would lead me to think it's detecting the network but not fully working or registered on it for whatever reason.
All I see is completely no bars in my signal bar. I can't dial or receive calls, I can't use emergency calls, but it does pickup my network as Vodafone NZ. Any ideas?
Update:
Switching to 2G, 3G and LTE doesn't do anything, still no signals. Also, looks like the Network Operators function is irrelevant to your SIM card. Unplugged my SIM and it was still able to scan for it.

I suggest you to try kitkat modem on lollipop os. I know someone has the same problem with you .I dont know why but some OPOs does not work with lollipop modems.

chaoscreater said:
Not sure if the phone radio is completely dead or not but I've lost all signals completely today. Nothing I do works.
If I go into Mobile Networks and choose Network Operators, the phone is able to scan for the networks and showed my correct carrier in the list. However I choose to register on it, it doesn't work. It just keeps scanning and doesn't register.
Tried flashing new ROM from scratch with new radios from CM and Oxygen (230 and 241) and neither works. Tried flashing via recovery and fastboot. Tried restoring from a working TWRP backup, still the same issue.
I took my SIM card out and tried on an older phone, works fine. Used another working SIM card on my OPO, still doesn't work. At this point, I think it could be a hardware issue with the phone. Only thing I'm confused about is why it's able to list the carriers in Network Operators and this was never an issue in the past. Also, it doesn't show a question mark in the signal bar so that would lead me to think it's detecting the network but not fully working or registered on it for whatever reason.
All I see is completely no bars in my signal bar. I can't dial or receive calls, I can't use emergency calls, but it does pickup my network as Vodafone NZ. Any ideas?
Update:
Switching to 2G, 3G and LTE doesn't do anything, still no signals. Also, looks like the Network Operators function is irrelevant to your SIM card. Unplugged my SIM and it was still able to scan for it.
Click to expand...
Click to collapse
Do you get to see your IMEI No.?

Yes, I do see my IMEI. Have tried all the solutions there are.......flashed oxygenOS, colorOS and imei is still there. I can see there's signal under About -> Status, but no network (unknown). My wifi works fine, just no phone signal.
My sim card is fine, tried on other phones and it works. Tried several sim cards in my OnePlus and they all fail. Wasn't like this last week, dunno what happened.
I think maybe my IMEI is blocked? I called my carrier and they said it's not. Will i need to contact OnePlus (my phone is the chinese version) to get this resolved?

Same problem. No reason. Just started happening last week...
I tried another network and it worked though.

Exactly the same problem here. It first happened when I traveled to Japan and inserted a Japanese SIM card, nothing worked, so I thought it's because of the strict radio regulations in Japan....now I'm in Ireland, popped a 3 Mobile sim card in, still not working.....God I would never buy a OnePlus product again....first the touch screen failed, now the modem......biggest mistake taking it travelling with me....

@chaoscreater @dahole @victorinoxs I have your same problem
IMEI, Baseband and WiFi are OK but no signal and status network unknown

Solutions people ! I am reading post forums , nobody haves a solution for this, is my phone Garbish?

I've got same problem after i forgot to connect antenna cable near the battery that comes from bottom board to main board. I've seen networks, but i were unable to use my phone inside any building
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https://www.androidfilehost.com/?w=search&s=Full-CM13
Try to flash this modem zip via twrp

AmazingHorse said:
I've got same problem after i forgot to connect antenna cable near the battery that comes from bottom board to main board. I've seen networks, but i were unable to use my phone inside any building
Click to expand...
Click to collapse
I am having the very same problem and, once I opened the One up I found the connector was disconnected.
But ... how to connect it back? It looks like it's a very difficult task to be accomplished!!!
SOLVED!
You can gently pull the pig tail cabletowards the center of the battery compartment, you connect it then push the cable back in.
The small narrow cable compartment that's on the side has a "soft curtain to keep the cablew in place. Be careful to put everything back in place properly.

Uqbar said:
I am having the very same problem and, once I opened the One up I found the connector was disconnected.
But ... how to connect it back? It looks like it's a very difficult task to be accomplished!!!
Click to expand...
Click to collapse
Antenna goes to bottom board near battery under rubber cover that you can unstick, connect and stick back. Just disconnect battery and pull antenna to the side of power button until you will be able to connect

AmazingHorse said:
Antenna goes to bottom board near battery under rubber cover that you can unstick, connect and stick back. Just disconnect battery and pull antenna to the side of power button until you will be able to connect
Click to expand...
Click to collapse
Yup! I "discovered" it shortly before you answered. And it worked indeed!!!

Same network issues !!
Hello everyone !!!
I'm new here and so dont know much how stuff works here. Hope to learn pretty soon
The thing is, I'm having similar problem with my OPO. I get only 4G network, no other network (2g/3g) gets connected. When on 4G, network randomly drops and connects, and when connected I can use internet, but just cannot make/recieve any calls. I have flashed many custom ROM's but to no avail. Finally after getting nowhere near solution, I stopped trying and currently I'm using Lineage OS (ver 14.1.20171001-NIGHTLY-bacon).
Drmuruga posted a link with CM13 modem zips, will flashing the CM 13 modem file work in my case ? If yes, there are two files on the link you provided, which one should I use ?

Vaibhav_F said:
Hello everyone !!!
I'm new here and so dont know much how stuff works here. Hope to learn pretty soon
The thing is, I'm having similar problem with my OPO. I get only 4G network, no other network (2g/3g) gets connected. When on 4G, network randomly drops and connects, and when connected I can use internet, but just cannot make/recieve any calls. I have flashed many custom ROM's but to no avail. Finally after getting nowhere near solution, I stopped trying and currently I'm using Lineage OS (ver 14.1.20171001-NIGHTLY-bacon).
Drmuruga posted a link with CM13 modem zips, will flashing the CM 13 modem file work in my case ? If yes, there are two files on the link you provided, which one should I use ?
Click to expand...
Click to collapse
Firmware can be a game player for sure.You can use modem from cm13(any of them,the first one is from snapshot builds).Infact, have a look at: https://forum.xda-developers.com/oneplus-one/general/firmware-modem-oneplus-one-t3462214
Which carrier are you on?

I am on Airtel (only 4g). I've tried using docomo as it is my secondary sim, but it never connects since it works on 3g network.
I've tried a couple of those from the list, but failed. Anyway, I'm gonna try the rest.
Does TWRP version matters ? I'm using 3.1.1-0.

Vaibhav_F said:
I am on Airtel (only 4g). I've tried using docomo as it is my secondary sim, but it never connects since it works on 3g network.
I've tried a couple of those from the list, but failed. Anyway, I'm gonna try the rest.
Does TWRP version matters ? I'm using 3.1.1-0.
Click to expand...
Click to collapse
It just needs to be latest.Try dialing *#*#4636#*#* in phone's dailer.Then,head over to Phone Information and you'll see preferred network modes.See attached screenshot.

Mr.Ak said:
It just needs to be latest.Try dialing *#*#4636#*#* in phone's dailer.Then,head over to Phone Information and you'll see preferred network modes.See attached screenshot.
Click to expand...
Click to collapse
Yeah I tried through that long before, but as soon as I set it on wcdma (only/preferred), there isn't any network (emergency mode only).
I've tried almost all firmwares from the link you provided using TWRP, but no luck. Maybe my card slot must have some hardware problem. Just to give it one last try, can you tell how I can Install those firmwares via ADB fastboot ?

Vaibhav_F said:
Yeah I tried through that long before, but as soon as I set it on wcdma (only/preferred), there isn't any network (emergency mode only).
I've tried almost all firmwares from the link you provided using TWRP, but no luck. Maybe my card slot must have some hardware problem. Just to give it one last try, can you tell how I can Install those firmwares via ADB fastboot ?
Click to expand...
Click to collapse
Doesn't matter.Twrp flashes the firmware just fine.
Ps- It could be network antenna.Any recent activity that could damage the phone's hardware? Jio 4G,Bsnl 3G and Airtel 3G works fine here.I'm gonna get my Airtel 4G sim tomorrow,and I'll keep you posted if it works too.

Galaxy s7 wifi issue. Connected but not online

Hello all. I have a asus rt-ac66u router set up trough my suppliers box wich is put in bridge and dhcp off so my asus handles everything. My asus us setup trough ppp0e. All other devices works fine even a s6. But my s7 connects and works for a while then dies. I can't even connect to the router. 192.168.1.1.
I've tried to remove all stored net so now I only have 2. I've tried to set ip in phone into static. No success. If I turn wifi off and on sometimes it will give me net, but it dies after some time.

I have an ac56u, no issues at all.
Using Asus official firmware, latest Merlin has some problems. Used to drop my g4 connection often, after I switched to Asus firmware everything was and it's still OK.
Sent from my SM-G930F using Tapatalk

KoRoZIV said:
I have an ac56u, no issues at all.
Using Asus official firmware, latest Merlin has some problems. Used to drop my g4 connection often, after I switched to Asus firmware everything was and it's still OK.
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
I'm using merlin, but the thing is that this phone is the only one struggling so I doubt it's the router. But off course I can always try official firmwire again.

Now I have factory reset my router and installed factory firmware. Forgotten all networks on phone. Still same issue. The strange thing is that after all this my phone gets the same ip as before everything. Ends on 53. Any ideas?

Have this issue to. Changed my first S7 for a new one because of this. Same problem with my second one. Have a Asus rt 87u or something like this. Latest update on the router and no mods.
I'm from Sweden and have read about this issue in Swedish forums as well. Hopefully there will be a bug fix from Samsung or Asus
skickat från Tapatalk

Sorry to hear this, I have no issues with mine, using automatic channel settings, wpa2 personal.
You can try to use a fixed channel
I even use the same ssid and pass for both 2.4 and 5ghz, this way when I'm out of 5ghz range it switches me on 2.4ghz band, and back to 5ghz when I enter the range.
Edit
Actually I use fixed channel, 48, not auto, I checked now.
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Sent from my SM-G930F using Tapatalk

I've done the drastic step to factory reset the phone and set it up manually. Not from what is saved on Google. Did this yesterday and it works for now. It's a pain to do but. I'll post here if it stops working. For now it works. The strange thing is that I reset my router at the same time but it still gives me a ip ending on 53 hehe.

syklitengutt said:
Hello all. I have a asus rt-ac66u router set up trough my suppliers box wich is put in bridge and dhcp off so my asus handles everything. My asus us setup trough ppp0e. All other devices works fine even a s6. But my s7 connects and works for a while then dies. I can't even connect to the router. 192.168.1.1.
I've tried to remove all stored net so now I only have 2. I've tried to set ip in phone into static. No success. If I turn wifi off and on sometimes it will give me net, but it dies after some time.
Click to expand...
Click to collapse
I have the exact problem (galaxy s7 with asus rt-ac66u router). I tried updating the firmware on my router and doing a factory data reset on my galaxy s7 (along with manual recovery). I'm still having the same problem.
I tried contacting Samsung and they recommend that I bring the phone to service technician (after, of course, recommending the factory data reset)... Maybe this is just a hardware issue after all? Seems suspiciously related to the asus router though..

So far it's working.

I'll take it back. Problem appeared again. Didn't do anything and it started working again after 5 min or so.

Actually. I turned off Bluetooth and it works again? So In my case it's a Bluetooth issue.

I have the same issue. I have call Samsung and i do a factory reset. It's work great but when i turn on just one time the bluetooth (and turn off just after), this issue come back.
I have send my phone to Samsung one time and the technicien don't see this issue. The phone come back but the problem is always present. So i re-send my phone to Samsung.
I wait a call from the technicien to explain my problem and how reproduct this issue.
I don't think that the problem is the router, because i have test on an other and i have the same issue.
And my Galaxy S3 (cyanogen), Galaxy tab pro, Lenovo A7-10 works great on the same network !
PS : Bad english = french speaker :silly:

syklitengutt said:
Actually. I turned off Bluetooth and it works again? So In my case it's a Bluetooth issue.
Click to expand...
Click to collapse
This seems like it's clearly either a Android 6 or a Galaxy S7 problem. Either way I think Samsung needs to find a solution fast. I'm in the process of returning mine on the chance it's a hardware issue. I don't really expect that to fix the problem though.

Today i changed my phone, this is my number 3. Right away after setup I got an upgrade of 70 mb. It will be interesting to see if I have the same issues with this one. Y earlier 2 had WiFi issues and battery drain when connected to WiFi.

shewless said:
This seems like it's clearly either a Android 6 or a Galaxy S7 problem. Either way I think Samsung needs to find a solution fast. I'm in the process of returning mine on the chance it's a hardware issue. I don't really expect that to fix the problem though.
Click to expand...
Click to collapse
Update:
I was combining my 2.4GHz and 5GHz bands into 1 SSID on my router when I experienced the problem. I separated the bands into their own unique SSIDs on my router and I was able to stay connected to my 2.4GHz network for 3 days and running (no issues).
I haven't gone back to see if I can connect to my 5GHz SSID yet so right now the problem is either hardware related to 5GHz or with Android 6/Galaxy S7 and combining SSID.

lezardvert said:
I have the same issue. I have call Samsung and i do a factory reset. It's work great but when i turn on just one time the bluetooth (and turn off just after), this issue come back.
I have send my phone to Samsung one time and the technicien don't see this issue. The phone come back but the problem is always present. So i re-send my phone to Samsung.
I wait a call from the technicien to explain my problem and how reproduct this issue.
I don't think that the problem is the router, because i have test on an other and i have the same issue.
And my Galaxy S3 (cyanogen), Galaxy tab pro, Lenovo A7-10 works great on the same network !
PS : Bad english = french speaker :silly:
Click to expand...
Click to collapse
Update :
I have receive my S7 but nothing change. The technicien don't call me and do nothing on the phone.
But for the bluetooth, isn't the cause. I have start my phone when i receive and i download a big game. The wifi's issue come back and i don't use the bluetooh. Wrong way ! Sorry.
I test the encryption key (WPA (TKIP) : issue , WPA(TKIP+AES) seems works better).

Samsung pushed an update yesterday. Everything has been working fine since. I'll post if anything changes. Still android 6.01 so I'm not shure what's new.

syklitengutt said:
Samsung pushed an update yesterday. Everything has been working fine since. I'll post if anything changes. Still android 6.01 so I'm not shure what's new.
Click to expand...
Click to collapse
What the version please ? I'm in APC8 and i have the issue.
Since i have change my router setting : Wifi with WPA(TKIP + AES), i don't have problem. Everything work fine.
But with WPA(TKIP) i have problem with this version(APC8)

i have problems also but i think i need to reset my router or something. i get intermittent service on wifi.

lezardvert said:
What the version please ? I'm in APC8 and i have the issue.
Since i have change my router setting : Wifi with WPA(TKIP + AES), i don't have problem. Everything work fine.
But with WPA(TKIP) i have problem with this version(APC8)
Click to expand...
Click to collapse
I have APC8 and have this problem
I changed my guest WiFi WEP settings now, just for a test to see what happens

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?
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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.
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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.

Access Point Name settings are not available for this user - Poco X3 NFC

Hi everyone,
My Dad is having a problem with a Poco X3 NFC that I hope someone will be able to help us with.
I bought the phone for him as a Christmas present last year from Amazon Germany, as his previous phone was quite old and had been having occasional issues, and poor battery life. We put his SIM from that phone into the new Poco X3 NFC and initially it seemed to be working fine, and he was very happy with it. However, after a while it started having issues where calls would occasionally drop, or he'd be unable to make a call. I took at look at it on one of these occasions, and noticed that the network reception icon at the top was greyed out, and had an x through it:
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Each time, a reboot fixed the issue, but it was annoying, and occasionally people couldn't reach him when they phoned him, presumably due to this same issue. At first we suspected the SIM, so we ordered a replacement from the network. Unfortunately the same issue occurred with it installed in the Poco X3 NFC. Then, to test this new SIM, we tried putting it into his old phone, which he then used for about two weeks. The issue did not occur on this phone during this time, but it occurred once again a few days after putting it back into the Poco X3 NFC.
So, we then thought that the problem was with the Poco phone itself. We contacted the retailer and they sent us a replacement (same model), and we set it up again. Unfortunately, after a few days it also exhibited the same problem. While the replacement phone was having one of these occurrences, I looked into it a bit more, and found something unusual in the APN settings. Here is how that screen looks when there is no problem - you can see the entry for our phone network:
However, when the problem occurs, I've discovered that the APN entry on this screen is missing, and instead the text 'Access Point Name settings are not available for this user' is present:
I believe the disappearance of the APN settings is causing the phone to lose its connection to the network, but I don't know why this is happening.
I did some Google searches for the above text, but a lot of what I found seems to be related to this being a permanent issue, not an intermittent one like we have. I also spoke to Xiaomi on a live chat on their website about this problem, but I wasn't confident in what they suggested. They first of all suggested that poor network coverage could be causing the issue, until I pointed out that this should not cause the APN settings to disappear.
They then advised trying a factory reset, and said if that didn't work that it could be sent away for repair. I don't think this is a hardware issue, and given that it's intermittent and we don't know how to recreate the problem, and that two models of this phone have both had this problem, I don't think sending it for repair will work. I'm also not keen on trying a factory reset since I'll have to back everything up and reinstall everything afterwards, and again, since both models of the phone had the issue, I'm not confident this will work either.
The representative on the chat also suggested that one of the applications installed by us could be causing the issue, but I'd have thought this to be pretty unlikely. I thought settings like this would be protected from other applications, and Dad only has a handful of applications on the phone, all of which are well known with thousands of users. All of these applications were also installed on his old phone and caused no problems there.
In case they are useful for anyone trying to assist us, below are the software versions on the phone. We've installed all prompted updates, and the problem still occurs with all of these installed.
Sorry this post got a bit long, but I wanted to include everything we experienced and tried so far. If anyone can help us out with this or suggest anything we can try, we'd be very grateful. Dad is very happy with the phone otherwise, but unfortunately it's not usable to him if its network connection isn't reliable.
Thanks in advance.

Please replace your SIM card.
I had this issue before too and it drove me nuts. I did all the steps you too undertook including getting a replacement phone. The solutions eventually was to get a new SIM (Of the same number.)
Even if your current SIM works fine in other phones, there is this weird pairing issue that occurs with Poco X3. There is already another user on the forum threads with this same issue who got it fixed by getting a new SIM by my suggestion.

Hi Alrich,
Thanks for your response. The thing is, with the first Poco X3 NFC we had, we tried a replacement SIM in it already, and we still got network disconnects and the X in the Network Reception icon. Admittedly, back then I wasn't checking whether the APN settings were going missing, but I suspect that would have been the case if I'd checked. Also, the replacement SIM that's having this problem in the current Poco X3 NFC works fine in Dad's old phone.
Is it likely that the SIM would work fine in a different phone, but still have problems in the Poco X3 NFC? I thought a faulty SIM would cause problems with any phone it was put in.

Though I don't have x3 NFC but the x3 pro, there's still some way to try.
You see the "Add APN" on your first screen shot?
Did you try manually adding the APN settings on your own?
Note down the APN setting from your dad's phone and manually type in your X3 NFC.
If you don't know the APN settings for your telecom service, you can ask your number carrier.
I guess you're in Ireland, so you can try this APN setting
Tesco Mobile Ireland APN Settings for iPhone 2023 - 4G 5G APN Settings
Tesco Mobile Ireland 4G LTE 3G APN Settings for iPhone Tesco Mobile APN Settings for iPhone In your Apple iPhone go to Settings -> Cellular -> Cellular Data Network -> APN and enter the following details Cellular Data: APN: tescomobile.liffeytelecom.com Username: blank Password: blank LTE...
www.apnsettings.org
Also remember some telecom service uses specific 4G bands that some phones don't support. So in this case, your phone can't find any signal, and it has to broadcast and try other bands to check if it works.

Try using 2g only or 3g only instead of lte/4g..... I am also having this kind of problem if set to 4g as preferred network.... There is problem with this phone 4g reception as I've used different phone at same location and the coverage is good.. Only with this poco x3 the 4g was unstable.