loosing reception/signal on my s8+ - Samsung Galaxy S8+ Questions & Answers

Somehow my s8+ loosing reception all the suddenly.
phone has never been dropped.
i am loosing cellular signal all the time. no mattere where i am.
first i thought it was software problem, an did all the right things. safe mode, checking third party apps,
hard reset, an all that.
then i downgraded the room back oreo to see if it helped, no luck ;(
changing sim did NOT help either.
any suggestions? i have no warranty left on the phone as it a bit over 2 years old.

Mine is doing the same thing, even with wifi. It started after the most recent update. I have been googling, but haven't found much so I assumed that it was localized to me. I have never had connectivity issues with this phone before.
Sent from my SM-G955U using Tapatalk

I am having the exact same issue, it all happened after I updated to android 9, even if you downgrade back to 8 it doesn't fix the issue, has anyone managed to find a solution ? Like henbone11 mentioned suggested sites with fixes from Google do not work. Thanks in advance

I was thinking bad modem software? Is it possible to get a older modemsoftware onto the phone with PIE installed?

Same problem here. Have not done any mods, always accepted the official updates.
Cant make or receive calls. (sometimes can make one or two calls right after restart). I do get text message notifications about missed calls. GSM data not working (sometimes seems to work for a bit but not enough to load a page or use maps.
WiFi and Bluetooth still work for me. so I'm using the s8 with another older phone for WiFi hotspot and calling.
Have done full factory reset, uninstalled all apps aso. Nothing brings it back - phone repair shops say they haven't heard s8 having these problems.

I have the same issue.
One day after I restarted my phone, it suddenly said no network connection. I did factory reset too, didnt fix it. Changed sim cards, still error.
I downloaded a widget that was supposed to turn the cell radio on and off. Cant turn the cell radio on either

Network Connection on s8
Mihkel.ee said:
Same problem here. Have not done any mods, always accepted the official updates.
Cant make or receive calls. (sometimes can make one or two calls right after restart). I do get text message notifications about missed calls. GSM data not working (sometimes seems to work for a bit but not enough to load a page or use maps.
WiFi and Bluetooth still work for me. so I'm using the s8 with another older phone for WiFi hotspot and calling.
Have done full factory reset, uninstalled all apps aso. Nothing brings it back - phone repair shops say they haven't heard s8 having these problems.
Click to expand...
Click to collapse
Did you get any luck fixing your s8+ network problem?

no, still no network.
have done everything I can without rooting.
Tried different SIM cards and network providers - no luck.

vargens said:
Somehow my s8+ loosing reception all the suddenly.
Click to expand...
Click to collapse
Hi,
This issue is quite easy to fix. As modem performance (connectivity) is linked to model configuration. Another word for this is CSC.
It is fine to change your CSC. Download a benchmark tool to monitor your connectivity and record values and do not feel afraid to update / change your CSC.
It can take a while to find the right one for you, not it will be worth it. Don't worry.
Note: CSC changer can be easily found in XDA.
Note: a restart may be required to take the configuration into account.
Cheers
Spyrou

Hi there mate!
spyrou007 said:
Hi,
This issue is quite easy to fix. As modem performance (connectivity) is linked to model configuration. Another word for this is CSC.
It is fine to change your CSC. Download a benchmark tool to monitor your connectivity and record values and do not feel afraid to update / change your CSC.
It can take a while to find the right one for you, not it will be worth it. Don't worry.
Note: CSC changer can be easily found in XDA.
Note: a restart may be required to take the configuration into account.
Cheers
Spyrou
Click to expand...
Click to collapse
Hi.. i want to do your solution.
What benchmark tool to use? And is there a tutorial for the process?
Thank you so much for the idea.
I moved to another country and used a local sim card, worked for a couple of days and then it's suddenly no network.
IMEi still ok.
Phone still detects my number.
I've tried
resetting network setting
factory reset
Flashing latest unbranded firmware via Odin
Still no luck.
The mobile radio switch won't turn on.
Ping test fails.
Sometimes I wonder if this is a hardware issue.

spyrou007 said:
Hi,
This issue is quite easy to fix. As modem performance (connectivity) is linked to model configuration. Another word for this is CSC......
Click to expand...
Click to collapse
Why would this work? Phone worked normally before. Same country/same provider. Sometimes still connects to data network for a minute and then drops all cellular connection again.
Why would changing CSC work.
Asking because changing CSC is not easy for me and I don't see why would I need to change it if it worked perfectly before. NFC payments worked(still work) , data/voice calls worked perfectly for 2 years. Then suddenly didn't.

Related

Constant "Emergency calls only" and no signal

Heyho,
about three weeks ago, my N5 suddenly lost it's signal over night and shows me "Emergency calls only" and it won't register into any network, just giving "Selected network unavailable".
When this occured my N5 had 4.4.2 stock ROM and rooted. I've unrooted it and updated to 4.4.4, but I still got the same problem.
Problem occurs with any simcard, while simcard works with other phones just fine.
Have deleted and reconfigured APN, but didn't make any difference.
I get a signal every few days, but I still can't receive text/calls or call/text anyone and my mobile data doesn't work.
I even tried to downgrade to 4.4, but that didn't solve my problem either...
I'm from Germany, but in New Zealand at the moment, so I really need my phone in case of emergencies and to stay in touch with family/friends.
I have been searching for a solution since it started, but have not been able to find anything that worked.
Sending it back to Google isn't an option right now because I am travelling.
I am really thankfull for any suggestions or if anyone knows how to fix this problem!
Cheers
Have you checked to make sure the network setting says 2g/3g/LTE preferred. Because I had this problem when it was switched to 2g only and was fixed by the above option
If the above fails trying going to your dialer and typing *#*#4636#*#*. Go into phone information and you should see a drop down box to select your network mode. Play around with those until you get a signal but you might not want to try CDMA options (WCDMA is ok) since you're on a GSM network.
Sent from my Nexus 5 using XDA Free mobile app
had exactly the same issue as you mentioned. Nexus 5 tends to lose network without any logical explanation and it tends to work at one place but stop showing network if you walk half a mile down the road (or may not show any network anywhere). Google has released an update in June in which they have updated the modem to solve the problem..given that I am in India and the June update was for India, Australia and Newzeland, it worked like a charm for me (all i had to do was flash the modem from twrp)..people as far away as netherlands have reported the modem to work for them..
NOTE: IF U INTEND TO FLASH THE LATEST MODEM, DO NOT FORGET TO TAKE A BACKUP OF YOUR CURRENT MODEM PRIOR TO FLASHING THE NEW ONE..
check your sim card. if you can, try someone elses.
Alright,
I've tried every thing again so far, but nothing seems to work.
Sitting in the library, I noticed that I get a signal, when connected to WiFi, which stays for 1-2 hours after disconnecting.
But I still can't make any calls or text and mobile data doesn't work though the APN is correctly configured and and data enabled.
I really hope to be able to solve this problem somehow, don't want to put aside my beloved N5 :/
_____________________________________________________________________________________________________________
Edit: Haven't found any solution so far and bought a new phone for the moment until I'm able to send it back to Google.
Might be an hardware issue and not software related.
Cheers
Kimpfimp said:
Alright,
I've tried every thing again so far, but nothing seems to work.
Sitting in the library, I noticed that I get a signal, when connected to WiFi, which stays for 1-2 hours after disconnecting.
But I still can't make any calls or text and mobile data doesn't work though the APN is correctly configured and and data enabled.
I really hope to be able to solve this problem somehow, don't want to put aside my beloved N5 :/
_____________________________________________________________________________________________________________
Edit: Haven't found any solution so far and bought a new phone for the moment until I'm able to send it back to Google.
Might be an hardware issue and not software related.
Cheers
Click to expand...
Click to collapse
hey kimpfimp... u r not alone .. ive had this problem for 2 months now .. .. i have a nexus 5 and i have this exact same problem .. leads me to believe maybe its software related .. started after lolipop .. havent been able to find a solution yet !
worst part is that it is happening on an Replacement device after i RMAd my first nexus for a power button problem !!
i hope its software related and can be fixed .. because google is now refusing to rma this as im now out of my warranty period !

[Q] Intermittent Internet on HSPA/LTE - Connection Drop

Hi, I have a very particular issue with my Oneplus One which it seems to me software related and I hope someone can help me here. I've tried to find an answer here in the XDA and in the Oneplus One forum but no one seems to have the same issua as mine. I've also tried to flash different modems, and doesn't fix it. Tried to play with the *#*#4636#*#* menu and didn't have luck as well.
Before I start I'm on Three network in UK. My phone is rooted but no Xposed installed. CM11S latest version installed.
Things I tried to solve the issue:
I've already tried to flash different modems or play with the *#*#4636#*#* menu but I have no luck. Tried factory reset, complete wipe on recovery and restore of the CM11S. Nothing helped.
What it happens is that sometimes, using HSPA or LTE I'm not able to use the internet. It doesn't seem to be a signal issue because I have full bars and I can even see the arrows up and down in the status bar inside the signal meter. I'm not able to use browser, listen to Spotify or anything internet related. Calls are ok. It usually an issue when I'm on HSPA+ but sometimes in LTE as well.
A reboot usually does the trick and makes it work, but sometimes not and it takes a while to come back and connect. That's really annoying.
Just another piece of info, it usually happens when I disconnect from Wifi and connect to the phone network or when I don't have signal (I'm in the tube for example) and come to an area where I have signal.
I hope someone here might be able to help. The only thing I haven't tried yet is to change to other carrier. But that would be last option as I appreciate the All-you-can-eat data allowance from Three.
Thank you in advance.
luccasvr said:
Hi, I have a very particular issue with my Oneplus One which it seems to me software related and I hope someone can help me here. I've tried to find an answer here in the XDA and in the Oneplus One forum but no one seems to have the same issua as mine. I've also tried to flash different modems, and doesn't fix it. Tried to play with the *#*#4636#*#* menu and didn't have luck as well.
Before I start I'm on Three network in UK. My phone is rooted but no Xposed installed. CM11S latest version installed.
Things I tried to solve the issue:
I've already tried to flash different modems or play with the *#*#4636#*#* menu but I have no luck. Tried factory reset, complete wipe on recovery and restore of the CM11S. Nothing helped.
What it happens is that sometimes, using HSPA or LTE I'm not able to use the internet. It doesn't seem to be a signal issue because I have full bars and I can even see the arrows up and down in the status bar inside the signal meter. I'm not able to use browser, listen to Spotify or anything internet related. Calls are ok. It usually an issue when I'm on HSPA+ but sometimes in LTE as well.
A reboot usually does the trick and makes it work, but sometimes not and it takes a while to come back and connect. That's really annoying.
Just another piece of info, it usually happens when I disconnect from Wifi and connect to the phone network or when I don't have signal (I'm in the tube for example) and come to an area where I have signal.
I hope someone here might be able to help. The only thing I haven't tried yet is to change to other carrier. But that would be last option as I appreciate the All-you-can-eat data allowance from Three.
Thank you in advance.
Click to expand...
Click to collapse
Have you checked if you had the right APN ?
Yes, Apr settings are right. Just to be clear. I can connect to HSPA and LTE. What happens is that the connection drops and just fix if I reboot.
luccasvr said:
Hi, I have a very particular issue with my Oneplus One which it seems to me software related and I hope someone can help me here. I've tried to find an answer here in the XDA and in the Oneplus One forum but no one seems to have the same issua as mine. I've also tried to flash different modems, and doesn't fix it. Tried to play with the *#*#4636#*#* menu and didn't have luck as well.
Before I start I'm on Three network in UK. My phone is rooted but no Xposed installed. CM11S latest version installed.
Things I tried to solve the issue:
I've already tried to flash different modems or play with the *#*#4636#*#* menu but I have no luck. Tried factory reset, complete wipe on recovery and restore of the CM11S. Nothing helped.
What it happens is that sometimes, using HSPA or LTE I'm not able to use the internet. It doesn't seem to be a signal issue because I have full bars and I can even see the arrows up and down in the status bar inside the signal meter. I'm not able to use browser, listen to Spotify or anything internet related. Calls are ok. It usually an issue when I'm on HSPA+ but sometimes in LTE as well.
A reboot usually does the trick and makes it work, but sometimes not and it takes a while to come back and connect. That's really annoying.
Just another piece of info, it usually happens when I disconnect from Wifi and connect to the phone network or when I don't have signal (I'm in the tube for example) and come to an area where I have signal.
I hope someone here might be able to help. The only thing I haven't tried yet is to change to other carrier. But that would be last option as I appreciate the All-you-can-eat data allowance from Three.
Thank you in advance.
Click to expand...
Click to collapse
Same problem here. Have you found a solution? Or is it a hardware problem?
Hey sorry for bumping an old post but I'm having the same problem. In the UK on non-EE T-mobile. I get enough signal and H seems to connect, but I can't access the Internet. The upload arrow shows but the download arrow rarely appears.
I've tried flashing different roms, modems, recoveries to flash them, all to no avail
I have the same problem, but I don't have to restart, putting the phone in airplane mode and releasing after 2 seconds does the trick. still very annoying. no one has any idea of how to solve it?
My ROM is CM11 44S

Nearby wifi portal causes constant reboots/restarts

Hi, I am trying to get an idea of how many people this is affecting.
I am on my second T-Mobile Galaxy S6. The first unit had a hardware camera defect as well as this wifi bug. I had them replace it and the new unit's camera is good but it has the same wifi issue. Here's what happens:
When I go to an area with an "open" wifi network, a notification pops up on my screen that says "Click here to connect to null." What's strange is I have almost all wifi features off, particularly "Network notification." It should not tell me when any network is available. I also have "Allow Always Scanning" off as well as Wifi Calling disabled (not that relevant). Anyway, once this happens, I have about 2 seconds to turn off wifi or else the phone will reboot. It's a "soft" restart though, meaning it shows the Samsung and T-Mobile logo then is back on again within 5-10 seconds and fully "booted" within 30 seconds. This will keep happening until I turn off wifi.
It's not just any wifi connection that will cause the issue. I think it has to be an "open" connection that uses a portal for authentication (think universities, hotels, airports, etc). Recently, I clicked on one of the notifications (connect ot null) and saw a Cisco portal. I am not sure if it's isolated to Cisco AP's
I have found about 4 people so far that have reported this issue. I am guessing we are not the only ones. I am guessing it's a software issue.
Have you seen this?
Yes, I have the exact same issue. Sadly I dont know why it's doing it or how to prevent it. I'm located in the Netherlands and when I click login the browser directs me to a KPN Fon login page.
Stolper said:
Yes, I have the exact same issue. Sadly I dont know why it's doing it or how to prevent it. I'm located in the Netherlands and when I click login the browser directs me to a KPN Fon login page.
Click to expand...
Click to collapse
I am very confused what's causing this. Can you confirm what settings you have enabled or disabled? Wifi calling, advanced switching, always scanning, etc? I disable everything and still get it. So it seems like it's not just Cisco login pages. It's also FON. Do you have any areas in your city that have public wifi hotspots with login pages like McDonald's or Starbucks or a university? It'd be great to see if it happens at those locations too.
I don't have wifi calling, advanced switching is disabled, always scanning is on, keep wifi alive in sleep is on. I will check when in the neighborhood of public wifi spots. to see what's happening. Only solution for me now is not using wifi, but that's not very desirable. Have you contacted Samsung about the problem?
Stolper said:
I don't have wifi calling, advanced switching is disabled, always scanning is on, keep wifi alive in sleep is on. I will check when in the neighborhood of public wifi spots. to see what's happening. Only solution for me now is not using wifi, but that's not very desirable. Have you contacted Samsung about the problem?
Click to expand...
Click to collapse
Yes they told me the same things you'd expect. First they said to restart the device. Then clear cache. Then try safe mode. Then finally to do a factory restore. None of these items work. Just curious, is there any way you can easily give me a dump (plain text list) of your apps installed, in a PM? I wonder if it's something software related. I can do the same but I just need to find a tool that can do it.
Edit: I found an app called "List My Apps" in the Play Store. I can't link you because I don't have enough posts under my name. Hopefully I can send you a PM with my list to compare.
wifi null and reboot Samsung galaxy s6
I have the same problem like other guys. My S6 reboot continously when the wifi is on and I am I'm the City ( Zürich -Switzerland)
Then only solution was to switch of the wi fi.
Anybody else expierencing the same issue?
Regards
I'm having the exact same issue. AT&T Galaxy S6 in Southern California.
How do we get this fixed? It's not limited to a provider (that's good).
I already exchanged a unit for the camera issue. I think I am probably past my date for another exchange and quite frankly the first one was such a pain to go through, I'd prefer not to. Anyone have any ideas? I am guessing it's some sort of software issue. Something trips it up when the phone is near a captive portal.
I'm not sure swapping units will help. I did that but it didn't fix it sadly. I contacted SamsungNL and they told me to go to a Samsung repair center to show them the problem. I will try to do that next week. Until then, mobile data only.
Hi guys,
I have contacted Samsung UK and they told me to bring the phone back and ask for a new one. This is not normal and we need a replace.
In the meantime I have try to install FXR wifi Fix and Rescue from play store. Did a reset of my WiFi with this app and since then Its working everything ok. No more Reboots in the last 5 Hours. I was also in public and crossed a lot of open networks but did not report more this issue.
Give it a try.
Regards
damigor said:
Hi guys,
I have contacted Samsung UK and they told me to bring the phone back and ask for a new one. This is not normal and we need a replace.
In the meantime I have try to install FXR wifi Fix and Rescue from play store. Did a reset of my WiFi with this app and since then Its working everything ok. No more Reboots in the last 5 Hours. I was also in public and crossed a lot of open networks but did not report more this issue.
Give it a try.
Regards
Click to expand...
Click to collapse
Samsung UK support are idiots. Seriously, they tell you to return the device for software faults. I contacted them about the LTE signal showing incorrect in the settings, a clear software fault, they said to return the device.
Honestly, Samsung support is useless.
I think no way to stop it atm bcoz it is a software issue, we'll need to wait for an update. I think the baseband of wifi/bluetooth is still not stable, today I heavily played with bluetooth and got a soft reboot too.
Luckily, my HK firmware got no wifi calling and any bugs, my wifi is fine.
damigor said:
Hi guys,
I have contacted Samsung UK and they told me to bring the phone back and ask for a new one. This is not normal and we need a replace.
In the meantime I have try to install FXR wifi Fix and Rescue from play store. Did a reset of my WiFi with this app and since then Its working everything ok. No more Reboots in the last 5 Hours. I was also in public and crossed a lot of open networks but did not report more this issue.
Give it a try.
Regards
Click to expand...
Click to collapse
This seems to be working. I also ran it and it fixed the problem. I think this points towards a faulty wifi database or something.
damigor said:
Hi guys,
I have contacted Samsung UK and they told me to bring the phone back and ask for a new one. This is not normal and we need a replace.
In the meantime I have try to install FXR wifi Fix and Rescue from play store. Did a reset of my WiFi with this app and since then Its working everything ok. No more Reboots in the last 5 Hours. I was also in public and crossed a lot of open networks but did not report more this issue.
Give it a try.
Regards
Click to expand...
Click to collapse
Thanks for posting this. It's the first attempt at a solution I have found. I am going to have to agree with others and say that replacing your device did nothing to help solve the issue. I think its a software issue, perhaps with the wifi drivers or database. I tried running FXR but I won't know if it worked til I get near a captive portal. Keep this thread going guys. This problem is frustrating as heck.
So guys,
I am Happy. In the last week (After I ran the FXR app) looks like the problem is solved for me. No one reboot and any problem with. Null or open networks.
Got 920f model but im not sure is the wifi problem on my phone or not. Phone keep rebooting itself in my pocket. 10 reboots minimum during the day. Tryed flashing another rom but same nothing changet. Not sure its a hardware problem or software.
Will a replacement fix this issue? I'm about to do it tomorrow. But I'd rather not do it if it's not necessary.
UPDATE: I replaced the phone, it did not fix the issue. Seems like we need to wait for an update, unless I am extremely unlucky.
PHPanos said:
Will a replacement fix this issue? I'm about to do it tomorrow. But I'd rather not do it if it's not necessary.
UPDATE: I replaced the phone, it did not fix the issue. Seems like we need to wait for an update, unless I am extremely unlucky.
Click to expand...
Click to collapse
Did you ran the FXR app suggested by @damigor? That fixed it for me.
Stolper said:
Did you ran the FXR app suggested by @damigor? That fixed it for me.
Click to expand...
Click to collapse
I totally missed that post. Trying it right now. I will report back if it worked or not.
Thanks!
Stolper said:
Did you ran the FXR app suggested by @damigor? That fixed it for me.
Click to expand...
Click to collapse
I took replaced my device, but for a real camera issue, not the wifi bug. I agree with Stolpler, running the FXR app completely fixed the issue for me.
For those new to this thread/issue, let me try to explain what's going on and why a phone replacement doesn't work.
The issue is entirely software and I think what's happening is that for some reason, a small amount of us have some corrupted entries in our wireless login database. We all know that if you get a new Android phone and sign into your Google account, all your saved wifi credentials (home, work, school, etc) will be automatically migrated over. That's why you don't have to re-enter your wifi password. For some reason, one of these entries must have gotten corrupted for some reason. Another possibility is for some reason, the way the S6 expects the data/format is different than how Android normally stores it. So say you had an entry from your Nexus 5 for a hotel login. Then now that you're on your S6, it tries to read it and it doesn't like the format so it blows up.
Now, the reason why a phone swap won't work is the moment you sign in with your Google account, it will transfer over your wifi database/settings. If you get a new phone but don't login (ever) to your Google account, I bet the wifi issue would not exist.
With all that said, really, go download and try the FXR fix. It works, it really does.

Wifi problem - on-off and no wifi hotspot, phone restarting - Please HELP

Hello everyone,
me and my wife enjoy our htc U11, but few days ago mine start playing up - wifi have difficulties to connect its doing like on-off-on-off, and after while connect to router, doing same thing at work and home too, and I really can't use any longer wifi hotspot, and phone restart at least once a day, not very happy, but today my wife experienced same problems as I have few days, must say both phones bought in UK from two different companies and different times, both are on stock rom, completely standard phones, I am only using modified camera apk, can anyone give me advice what it could be?, I do not have even Facebook or Twitter account, so can't be related to these apks. Was going to do hard reset tonight, but after my wife told me she got same problems and she use her phone very little, I am not sure if hard reset will resolve problems. I will welcome any help...
Forgot to say we are on 2.33.401.10
Many thanks..
Settings>more>data usage>network restrictions>check to see if the network has been restricted.
Settings>more>three dots (overflow menu) and hit "reset network settings"
Have you reset the router, checked the network settings are correct (if you use dhcp just reset your router).
If the ssid has spaces or characters/symbols then this can cause issues.
I have personally known routers that use signal binding to run at speeds incompatible with some devices. Especially those with 1gb interfaces. *cough netgear*.. Falling back to a basic setup helps significantly.
A factory reset will probably solve it but you'll lose your data. That is the last ditch effort.
Hi, what is latest update for this rom?, as we can get no ota update, if you point me right direction, will be great, and I will update at least one phone, and see difference. I already reset home router, I reset network setup on phones, wipe cache on both phones, still problems, and even when I am not at home, wifi playing, as I can setup wifi hotspot and I am away from any wifi. Many thanks..
Sorry that was my bad, I forgot I was looking at my m9, not my U11. You are up to date.
My post has been edited. Follow that.
To have the same problem on both phones is very strange indeed. It must be network settings causing the problem unless you have an app running that monitors WiFi in some way..
I, too, have been having WiFi problems all of a sudden. I am not stock, I'm on viper with EAS kernel, but was running it all just fine for a while then without changing anything, I have the same problem.
Still looking for fix, but no luck so far, tonight I reset router just to be sure, but problem is still there, I am sure sooner or later I will find out what is behind this problem.
Hi i encounter rhis problem on stock htc ron and i flash latest slim build and everything worked form me
SlimOS link
slashray said:
Hi i encounter rhis problem on stock htc ron and i flash latest slim build and everything worked form me
Click to expand...
Click to collapse
can you give me link of working SlimOS ? and its safe ?

Huawei Y9 Intermittently not recognising SIM Cards

My Huawei Y9 has recently started to intermittently stop recognising either SIM card in the dual sim slots. Once this happens I can restart the phone or set to aeroplane mode for a number of minutes and this usually resolves it for a short period before the exclamation comes again in place of the mobile reception.
I have confident of both SIM cards functioning well as I have tried them in another phone, and also tried a different SIM card in my phone and the error occurred again. So I am sure that the issue is with the phone.
I have followed the following steps but to no avail:
Restarting phone
Removing SIM cards
Checking other SIM cards
Running in Safe Mode
Clearing Android Cache via Recovery mode
Reset Network settings
Checked for IMEI (It is there when the card is working, and null when it isn't)
Have the latest updates installed
Other than a factory reset (which I don't want to do until I have exhausted all options), I am not sure what to do. The phone is only six months old and still under warranty, however it was bought in Cambodia and I am now living in Brazil so I don't think they have service options readily available here.
Any suggestions?
Oisin_B said:
My Huawei Y9 has recently started to intermittently stop recognising either SIM card in the dual sim slots. Once this happens I can restart the phone or set to aeroplane mode for a number of minutes and this usually resolves it for a short period before the exclamation comes again in place of the mobile reception.
I have confident of both SIM cards functioning well as I have tried them in another phone, and also tried a different SIM card in my phone and the error occurred again. So I am sure that the issue is with the phone.
I have followed the following steps but to no avail:
Restarting phone
Removing SIM cards
Checking other SIM cards
Running in Safe Mode
Clearing Android Cache via Recovery mode
Reset Network settings
Checked for IMEI (It is there when the card is working, and null when it isn't)
Have the latest updates installed
Other than a factory reset (which I don't want to do until I have exhausted all options), I am not sure what to do. The phone is only six months old and still under warranty, however it was bought in Cambodia and I am now living in Brazil so I don't think they have service options readily available here.
Any suggestions?
Click to expand...
Click to collapse
Hello Oisin
I'm facing the exact same issue here. It's started the day after the last update (FLA-LX1 8.0.0.124 (C185)). Please tell me if you have the same firmware.
Well, I also tried Factory reset and even flashing the same official firmware doesn't solve it. I talked online with Huawei support (from the app) they told me that It's a software issue and to do all kind of reset... But it was un vain.
From my point of view, the culprit seems to be an built-in app that ask for location or network Time. But every time it does the phone reject the sim as you said earlier. Note: It's still do it even with the location disabled (asking for network time)
I spotted the app last week, It's com.hisi.mapcon. As I'm typing this message, I decided to revoke this app authorisations to modify system parameters. I'll tell you if that solves the issue
Otherwise I'm planning to downgrade the firmware (the last step before I break this phone out of anger)
See ya
---------- Post added at 04:26 PM ---------- Previous post was at 03:55 PM ----------
Revoking the authorisations didn't make it. Now I will debloat this app... It seems kind of useless while being troublesome
For now, I just disable location. And there's a little trick to keep your signal on. While disabling location, soon after you'll get a notification tile that the phone need location enabled. At this moment the signal will disappear. Don't enable the location just keep the notification as is. And toggle the airplane mode on for 10 secs. Then toggle it off. Tadaaa! Signal is back... It'll stay on as long as you don't erase the notification or enable location .... Still, if you reboot your phone, you have to do it again... This is just a "patchwork" while waiting for a solution but it works
Mumiby2 said:
For now, I just disable location. And there's a little trick to keep your signal on. While disabling location, soon after you'll get a notification tile that the phone need location enabled. At this moment the signal will disappear. Don't enable the location just keep the notification as is. And toggle the airplane mode on for 10 secs. Then toggle it off. Tadaaa! Signal is back... It'll stay on as long as you don't erase the notification or enable location .... Still, if you reboot your phone, you have to do it again... This is just a "patchwork" while waiting for a solution but it works
Click to expand...
Click to collapse
Hi Mumiby,
Thanks for the help and reply.
I have FLA-LX2 8.0.0.126 (C636). I can't pinpoint the exact time the error began unfortunately. However your work around fixes the issues as you suggested. Thanks for that. Although as you said, it is only patchwork and not a long-term solution. Any idea if Hauwei are aware of this or likely to fix it?
Oisin_B said:
Hi Mumiby,
Thanks for the help and reply.
I have FLA-LX2 8.0.0.126 (C636). I can't pinpoint the exact time the error began unfortunately. However your work around fixes the issues as you suggested. Thanks for that. Although as you said, it is only patchwork and not a long-term solution. Any idea if Hauwei are aware of this or likely to fix it?
Click to expand...
Click to collapse
Hi.
Well, I came here on xda to post this problem because Huawei didn't react to this issue. Maybe there's not enough people complaining about it to make a move. I bought my phone in Morocco and now I'm in Congo DR. There's no Huawei Customer Care here and reporting to the online service is sort of hopeless. As I told you I'm planning to downgrade the firmware so that I can give them evidence for the bug
Mumiby2 said:
Hi.
Well, I came here on xda to post this problem because Huawei didn't react to this issue. Maybe there's not enough people complaining about it to make a move. I bought my phone in Morocco and now I'm in Congo DR. There's no Huawei Customer Care here and reporting to the online service is sort of hopeless. As I told you I'm planning to downgrade the firmware so that I can give them evidence for the bug
Click to expand...
Click to collapse
OK, just to note, I can delete the notification of location services and the SIM error does not return. Only if I restart the phone or turn on location. I have passed this information on to Huawei Cambodia also.
Oisin_B said:
OK, just to note, I can delete the notification of location services and the SIM error does not return. Only if I restart the phone or turn on location. I have passed this information on to Huawei Cambodia also.
Click to expand...
Click to collapse
Do you still have signal right now ? Maybe It's my imagination, it seems to me that when the phone asks for location it enable it for a few secs maybe to warm it up... I'm not sure about it but if the location app or the gps driver (maybe the radio) is the culprit then it does make sense. Logcat would be helpful for investigation.
I deleted the notification too. Let's see how long it last
Mumiby2 said:
Do you still have signal right now ? Maybe It's my imagination, it seems to me that when the phone asks for location it enable it for a few secs maybe to warm it up... I'm not sure about it but if the location app or the gps driver (maybe the radio) is the culprit then it does make sense. Logcat would be helpful for investigation.
I deleted the notification too. Let's see how long it last
Click to expand...
Click to collapse
Well last night the battery died and the phone was restarted. I left the location services off, and since restart the sim is working fine. So it is clear the sim not being recognised is directly related to the location services being on.
Oisin_B said:
Well last night the battery died and the phone was restarted. I left the location services off, and since restart the sim is working fine. So it is clear the sim not being recognised is directly related to the location services being on.
Click to expand...
Click to collapse
So we just have to wait an update from Huawei. Btw I still have signal without the notification... It's kind of weird because before around 20 minutes after deleting the notif' it would get back and kick out the signal .... Maybe we did find a better workaround ?
Hey Oisin
Does the workaround still work? Did you have some updates ?
Hi Mumiby,
Yes so some updates on my part. Firstly, after my last post I decided to turn on location services again to see how long it would take for the error to reappear and to gather proof of the error. Surprisingly, the error did not, and has not reappeared.
I also upgraded to the latest firmware a few days ago (.128) and all is still good.
Oisin_B said:
Hi Mumiby,
Yes so some updates on my part. Firstly, after my last post I decided to turn on location services again to see how long it would take for the error to reappear and to gather proof of the error. Surprisingly, the error did not, and has not reappeared.
I also upgraded to the latest firmware a few days ago (.128) and all is still good.
Click to expand...
Click to collapse
Well It seems like the location needed to take a break ....
On my side I still don't have any updates coming, unfortunately I still can't enable the location without network crash but the signal stay on without notification. I hope I'll get an update soon.
By the way, I noticed that there's a lot of people viewing our topic but none of them react ...
At last! Update available the .128 as you
Three days without problems After update. I think it's solved

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