Develop Bugs

[Q] Network issues

Hi everybody
I recently purchased a galaxy s2 Tmob but I have network issues
When I insert my SIMPLE MOBILE sim card, everything's fine, I can do phone calls, send sms and go online with data (but internet is slow), after few minutes the internet connection becomes very slow and then drops; followed by the network (the phone doesn't find network anymore)
The network comes back only if I restart the phone and it goes again
When I got the phone it was android 4.0.4
I tried to update with Samsung Kies, but a problem occured and I used "Kies recovery mode" to do the update
Finally the phone was successfully updated to android 4.1.2 but still the same problem. I did a factory reset+data deleting through settings and I still have the network issue
After some researches on the forum, I saw terms like "stock rom" and "radio" always mentionned where people had others network issues but I don't understand all that
Does somebody know how to fix it?
Thank u

hi
I found something to do about that
I saw on certain posts people saying that network problem can be fixed by flashing last radio version
so, that's what I did and by the way I rooted the device to flash SGH-T989_UVMC6_radio.zip
The problem seems to be solved but I'll wait to see if the network won't disappear again

Again, network is gone after 30 mn
pls someone can tell me what to do to solve this problem?

Where did you buy your phone? It sounds like it has a bad radio.

I used craigslist
when I bought it, I tested it with my sim card, there was no problem
U mean by bad radio an hardware problem?

hello, does someone have a tip for me to get my problem solved?

[Q] No Network Access on Galaxy Note 2 ATT

Hello my name is Stanley, I recently bought a Galaxy Note 2, I'm from the Dominican Republic so I'm using Claro Dominicana, which uses the same baseband as AT&T, basically instead of the signal bar, I get a circle with a straight line on it, I don't have data, I can't make calls, I can't send sms, when I try to call I get no network access message, I believe it does recognize sim because I don't get any type of error when my cellphone boots up, when I bought this cellphone it wasn't rooted, so I decided to root it and flash a rom, I'm having same issues.
Can you guys help me out please? I already have my APN information but it's not helping, I've tried flashing roms and it's not helping, I really don't know what to do, when I first bought it, I tried my sim out and it did have internet, I decided to do a factory reset through settings menu and after that I haven't been able to get any type of signal, I would deeply appreciate your help guys, I'm getting kind of desperate here.

No signal bars means no modem or a sim card for a dead account. Did you pay for any airtime?

stanleyacosta said:
Hello my name is Stanley, I recently bought a Galaxy Note 2, I'm from the Dominican Republic so I'm using Claro Dominicana, which uses the same baseband as AT&T, basically instead of the signal bar, I get a circle with a straight line on it, I don't have data, I can't make calls, I can't send sms, when I try to call I get no network access message, I believe it does recognize sim because I don't get any type of error when my cellphone boots up, when I bought this cellphone it wasn't rooted, so I decided to root it and flash a rom, I'm having same issues.
Can you guys help me out please? I already have my APN information but it's not helping, I've tried flashing roms and it's not helping, I really don't know what to do, when I first bought it, I tried my sim out and it did have internet, I decided to do a factory reset through settings menu and after that I haven't been able to get any type of signal, I would deeply appreciate your help guys, I'm getting kind of desperate here.
Click to expand...
Click to collapse
Did you try the free network unlock?
Might just not be unlocked

rangercaptain said:
No signal bars means no modem or a sim card for a dead account. Did you pay for any airtime?
Click to expand...
Click to collapse
My service is active, I already tried the sim on another cellphone, I can do everything on the other cellphone, I have data, I can make calls, etc, thanks for answer.
crixley said:
Did you try the free network unlock?
Might just not be unlocked
Click to expand...
Click to collapse
I did try it, I'm pretty sure is unlocked because it was just working before factory reset, I guess I can try to do it again, but I'm pretty sure is unlocked.

I tried several roms and modems and nothing worked, the last thing I did was going back to stock through Odin, but I still get same circle with the line on it, a stop sign, right now I'm on 4.1.1 stock..

stanleyacosta said:
I tried several roms and modems and nothing worked, the last thing I did was going back to stock through Odin, but I still get same circle with the line on it, a stop sign, right now I'm on 4.1.1 stock..
Click to expand...
Click to collapse
i don't know if this might be an issues or not, but check your IMEI. T-Mobile webpage has a method to confirm if it been blocked or not.
http://www.t-mobile.com
As of August 8th of 2013, they've re-designed their webpage.
http://www.t-mobile.com/bring-your-own-phone.html
following that link, scroll down until you see this: "Don’t see your device?" and under that, a search box. click on the link below that search box. it'll bring up a screen within the webpage. input the IMEI from your phone (*#06#) and avoid adding "/ ##" as those aren't part of the IMEI. If it report as stolen, chances are, they probably blocked it. If not, then maybe your provider doesn't support the phone itself. you might have to call customer service from your area.

Ziken said:
i don't know if this might be an issues or not, but check your IMEI. T-Mobile webpage has a method to confirm if it been blocked or not.
http://www.t-mobile.com
As of August 8th of 2013, they've re-designed their webpage.
http://www.t-mobile.com/bring-your-own-phone.html
following that link, scroll down until you see this: "Don’t see your device?" and under that, a search box. click on the link below that search box. it'll bring up a screen within the webpage. input the IMEI from your phone (*#06#) and avoid adding "/ ##" as those aren't part of the IMEI. If it report as stolen, chances are, they probably blocked it. If not, then maybe your provider doesn't support the phone itself. you might have to call customer service from your area.
Click to expand...
Click to collapse
I couldn't find information about my imei using that webpage, it wasn't able to locate it, I used this webpage which said is clean http://swappa.com/esn I don't know if that page is good, but it says it's clean and ready for activation.

Try a friends sim card to rule that out

If the phone worked on your network before you rooted and flashed the new rom, then I imagine you must have flashed an incompatible modem. If you flashed stock back via Odin and that didn't fix it, I'm scratching my head. Try stock again. Then remove and insert the sim or toggle airplane mode. If it worked before, stock should fix it.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

Hello guys, in this case it was actually a hardware problem it seems that the internal antenna of the cellphone which receives the network signal was damaged, I'm already getting it replaced, I'll let you guys know the results.

stanleyacosta said:
Hello guys, in this case it was actually a hardware problem it seems that the internal antenna of the cellphone which receives the network signal was damaged, I'm already getting it replaced, I'll let you guys know the results.
Click to expand...
Click to collapse
Do you know what was damaged. Is it the wire connecting the USB flex or is it the antenna built into the back housing?

[Q] Very bad service, not able to update, doesn't recognize other simcards

Something really weird is going on with my At&t galaxy s3. I'm new to this forum so I'll just explain what I'm experiencing and do my best to work through it will all of you. This phone got rooted by someone else and when I got it, the rooted program was in chinese and was acting all weird and wasn't getting good reception, although it was before it was rooted. I flashed it back to normal and it's acting very curious. It will receive an At&t simcard but the service bars will go from 1 bar to 4g to Edge to 1 bar all in a matter of 20 seconds or so and doesn't seem to work. It will occasionally work to send messages, make calls, but it seems like it can't ever receive calls. I checked and the IMEI number is still the same. Also, I had originally tried to unlock it to another carrier and when I put in different simcards (From other carriers such as verizon) the service bars don't show up, instead, all it shows is a cancel sign and doesn't ask for an activation code or anything. I'm honestly not sure what to do here, I thought I had broken the simcard reader and replaced that, but that made no difference. I'd greatly appreciate any help. Thanks!

StookDog said:
Something really weird is going on with my At&t galaxy s3. I'm new to this forum so I'll just explain what I'm experiencing and do my best to work through it will all of you. This phone got rooted by someone else and when I got it, the rooted program was in chinese and was acting all weird and wasn't getting good reception, although it was before it was rooted. I flashed it back to normal and it's acting very curious. It will receive an At&t simcard but the service bars will go from 1 bar to 4g to Edge to 1 bar all in a matter of 20 seconds or so and doesn't seem to work. It will occasionally work to send messages, make calls, but it seems like it can't ever receive calls. I checked and the IMEI number is still the same. Also, I had originally tried to unlock it to another carrier and when I put in different simcards (From other carriers such as verizon) the service bars don't show up, instead, all it shows is a cancel sign and doesn't ask for an activation code or anything. I'm honestly not sure what to do here, I thought I had broken the simcard reader and replaced that, but that made no difference. I'd greatly appreciate any help. Thanks!
Click to expand...
Click to collapse
Unlock is supposed to be permanent so it's odd that you lost it.
Now as for your problem, a lot of people are getting this issue lately, where unlocking damages their nv file. The solution can be found here: http://forum.xda-developers.com/showpost.php?p=43842387

BWolf56 said:
Unlock is supposed to be permanent so it's odd that you lost it.
Now as for your problem, a lot of people are getting this issue lately, where unlocking damages their nv file. The solution can be found here: http://forum.xda-developers.com/showpost.php?p=43842387
Click to expand...
Click to collapse
Thanks for your quick response I have been looking for a long time and never saw this issue before. I'm not sure where I'll be able to find a replacement nv file...but i'll see if anyone I know has a galaxy s3 from at&t. Maybe once I do this the unlock issue won't be messed up anymore.

Networ Signal Loss after update

Hi..
I have a Zenfone 5Z, bought on GearBest, so yesterday it updated to the latest WW version o it's on. After updating it lost the Network Signal, even after a several restarts. I've downgraded it to WW__ZS620KL_80.10.8.54_MP_user_20180517175955 , but still no network signal.
I've tested my simcard in other phones, other simcards in my phone, but still nothing. When i try manual network seach, it gives an error, and when i select automatic network, it says that is already registered to network, and when i try to make a call, it says me to turn off airplane mode to make a call. Also when i remove and reinsert the simcard it recognizes it a makeme chose betwen sim 1 and 2.
I've attached few screenshots too.
Pleaase help me guys!
P.S. i gave this phone to my wife on her birthday, now, she is mad with me!

HI,
I had this same issue, later i checked up with service center, they told charging pcb(which contains antenna lines) was water damaged.
Then got replaced the part and started working again.

vishal hatti said:
HI,
I had this same issue, later i checked up with service center, they told charging pcb(which contains antenna lines) was water damaged.
Then got replaced the part and started working again.
Click to expand...
Click to collapse
Yes, but after an update you lost network signal?
My phone never got wet, and never fell down.
Thanks!

vileladelima said:
Yes, but after an update you lost network signal?
My phone never got wet, and never fell down.
Thanks!
Click to expand...
Click to collapse
Hi, Yes, even I had not let my phone get wet or dropped but phone is so worst when it comes to water resistance.
Smallest moisture in hands while using the phone is enough to spoil the PCB.

vileladelima said:
Hi..
I have a Zenfone 5Z, bought on GearBest, so yesterday it updated to the latest WW version o it's on. After updating it lost the Network Signal, even after a several restarts. I've downgraded it to WW__ZS620KL_80.10.8.54_MP_user_20180517175955 , but still no network signal.
I've tested my simcard in other phones, other simcards in my phone, but still nothing. When i try manual network seach, it gives an error, and when i select automatic network, it says that is already registered to network, and when i try to make a call, it says me to turn off airplane mode to make a call. Also when i remove and reinsert the simcard it recognizes it a makeme chose betwen sim 1 and 2.
I've attached few screenshots too.
Pleaase help me guys!
P.S. i gave this phone to my wife on her birthday, now, she is mad with me!
Click to expand...
Click to collapse
I have the similar issue.Is it resolved for you ?

SenthilNaga said:
I have the similar issue.Is it resolved for you ?
Click to expand...
Click to collapse
Nop, i had to send the phone to Asus authorized service center, they changed the SUB PBA...
I works for exact 30 days and, after a restart becouse the system crashed, it has no network again!
so i sent it to serce center again today...

As I don't see a reply stating how it got resolved, I will post my experience of this issue. Firstly, this issue is fairly common with Huawei 5Z. The reason given by local service team here is at times if the phone experiences some jerk the contact from antenna to motherboard breaks. At times it could still remain connected in which cases person may get signal some time and get airplane mode at others, in many cases airplane mode is ON permanently. Apparently they have some kind of a glue with which they can attach the antenna permanently. Once I got it done, the problem has not resurfaced.
P.S. this problem has got nothing to do with software, so restart, factory reset etc. will not work, nor does it happen with software upgrades. It is purely mechanical in nature and does not need even require a drop. but the solution is quite simple provided the service centre team knows. In case they don't just ask them to stick the antenna connector with a proper glue and it should be sorted.

What am I supposed to do with my set. I imported it to my country and can't find a service center anywhere in my country. Apparently I can't find any solution online so I am out of luck. If there is anyway I can fix it, or anyone could share what should be replaced will be immensely helpful.
Need your help guys.

LineArc said:
What am I supposed to do with my set. I imported it to my country and can't find a service center anywhere in my country. Apparently I can't find any solution online so I am out of luck. If there is anyway I can fix it, or anyone could share what should be replaced will be immensely helpful.
Need your help guys.
Click to expand...
Click to collapse
Based upon above comment if the root cause is same as described i.e. connection b/w motherboard and antenna bands is broken then you can watch teardown video on YouTube for 5z by wit rigs. It shows how you can disassemble each part of the device for repair.
Apparently you will need to have some expertise and tools available to perform the task yourself. Better work with some local mobile repair workshop and explain them by showing video and above comment.

i am currently using 5z and i can says its due to updates especially from oreo to pie ( yes this problem is originated from that update). Its a software problem and they cannot solve the bug till now. There are still lots of 5Z with this issue pop up every week. The solution is to send to service centre to replace the motherboard and pray it wont happened again. This is my second time sending my phone there for the same issue. The antenna or motherboard dont simply fry or disconnect after an updates thats for sure.

Randomly changing different sim cards in the sim slots along with fiddling with the mobile data setting that comes when you insert the sim card tray worked for me, it worked for someone in zenfone forum also. Give a try and let everyone know..

Same here, after update signal lost... damn ASUS

My network signal stopped out of the blue and not after an update.
I tried changing sim cards in a lot of different combinations, but nothing worked, but the phone always found the sim cards.
I disassembled the phone, removed the antenna cable and attached it again and now the network signal is back again.

I had same problem. After the latest update, Everything working fine untill one day i restarted my mobile. Damn.. After reboot, the signal disappeared and can see 'x' at signal bar. I have rebooted many times but of no luck. Then i removed the sim tray , swapped the sims and then the signal starts showing. Initially after the update, one time I faced same issue but that got cleared after I disabled and enabled the sim in "Sim Card Information". The only issue i a, facing is the signal drops for every few minutes or hours and comes back automatically. That's what making me to replace my phone other than ASUS. Does anybody have a solution for this issue?
Update :
My phone had a sudden reboot and since then there is no network. Showing no service even if i swapped sims and re inserted. frustrated with ASUS

Refer here:
https://forum.xda-developers.com/zenfone-5z/how-to/guide-network-loss-sim-card-getting-t3946176

hamzasr said:
Refer here:
https://forum.xda-developers.com/zenfone-5z/how-to/guide-network-loss-sim-card-getting-t3946176
Click to expand...
Click to collapse
No. In my case/In most of the cases, its not the harware issue. initially i thought the same. But later found that only after updating to the latest update i faced network loss issue. sim not used to detect even after taking the sim tray out, shuffling with sims. I downgraded the firmware to previous version and then immediately i could see full network signal. So the issue is only with the latest, not with the hardware. Just give a try and confirm..
The same i have mentioned in that post also. Just give a try and update. Definitely that will work

krishna13 said:
No. In my case/In most of the cases, its not the harware issue. initially i thought the same. But later found that only after updating to the latest update i faced network loss issue. sim not used to detect even after taking the sim tray out, shuffling with sims. I downgraded the firmware to previous version and then immediately i could see full network signal. So the issue is only with the latest, not with the hardware. Just give a try and confirm..
The same i have mentioned in that post also. Just give a try and update. Definitely that will work
Click to expand...
Click to collapse
So I can do the same as you: downgrade to get fine.
But how to still updated firmware and keep the signal?

LeonardoLimaMH said:
So I can do the same as you: downgrade to get fine.
But how to still updated firmware and keep the signal?
Click to expand...
Click to collapse
The only solution is to walk to the nearest service center and make the antenna fixed. I have given my phone to the authorised service center and they resolved the issue by applying glue to antenna (they told same). They charged for the diagnosis as well as for glue. They guaranteed that the issue wont repeat. But i hated the service by ASUS and planning to go for samsung or Oneplus.. My suggestion is go to service center to get it fixed

For all of you still facing the issue, the solution is extremely simple. And yes it is purely mechanical in nature just like someone mentioned too. I just wrote a post regarding this. Check it out.
https://forum.xda-developers.com/zenfone-5z/help/zenfone-5z-network-sim-solution-t3985337
It does not even require to take the phone apart.

Question Signal / Reception problems

Hello everyone.
For the past 2 weeks, I have been having a very hard time receiving and making calls.
I currently live in the UK and have Lebara which I think uses Vodafone's network.
My phone shows that it has a 5G connection which I have not verified when it comes to data speeds but I have an internet connection and can receive/send text messages.
Assuming the issue originated from the ROM I was on Syberia Project android 11, don't remember the exact build number), I flashed the Pixel Extended ROM beta.
Link to the ROM (Thanks to the developers btw, it's a great ROM) [ROM][OFFICIAL] Pixel Extended ROM V4.0 Android 12 [alioth/aliothin][01.11.21]
After flashing the issues still persisted so I gambled and flashed the NON-HLOS.bin modem file from the original MIUI firmware in hopes that this would resolve the problem.
In addition I should mention that when I open my sim settings and try disabling the "Automatically select network" option, it says that it "Couldn't find networks. Try again.". I would also get this message before moving to android 12 on Syberia Project
At this point, I am running out of ideas and things to try to resolve the issue. I should point out that I dropped the phone from the height of around 1m on the carpet the other day but I don't think the drop was hard enough to crack any solder joints or damage the internals in any way.
After some searching, I found this app called Network Cell Info Lite which puts my reception at -110dBm. Even though a bit low when it comes to signal strength this should be more than enough to make calls.
Anyway, sorry for the long post but I have no idea why the phone behaves like that. Especially out of the blue and on 2 different roms.
Thanks in advance for any help.

Hello again, any ideas on the issue guys and gals? I have run out of ideas/solutions. At this point, I am considering a hardware problem.

As a thumb rule, always flash to stock before trying to diagnose hardware problems as it could likely be a bug in the software. If problem persists in stock, RMA

Understood! Will try it the first chance I get. If that doesn't work it's back to Xiaomi.