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] Wi-Fi 802.11n doesn't work with a Russian sim card, is there a fix?

Hello. I've poked, googled and searched around trying to find a way to fix this annoying issue.
Long story short: till 2004-2005 Wi-Fi N bands weren't legalized for civilian use in Russia. Now they are and we here still sometimes receive such devices which block usage of those bands. I've faced the same idiocy with Xperia S.
GB worked with channels 1-11 of Wi-Fi N (yet 12-13 should have been available too since Russia != US). Still it was bearable. ICS was the same (I've inquired about this issue a couple of times on the official forum to no avail).
Here the long-awaited JB update comes up (hooray) and bam - Wi-Fi N is blocked. Now if I pull out the sim card and turn on my phone - it will successfully connect to Wi-Fi N network. If I put it in and reboot the phone - the phone will connect to the N network for the first few seconds and then - as soon as it initializes the sim card - it will drop the connection. If I don't enable 'G/N mixed mode' on my home router, it will be sitting with no connection and showing me that N network but it would not connect to it.
Now as I told before I've been searching around internetz and was able to find some lose ends and few possible fixes to this issue.
1. Region code change. Doesn't work. It did before when the phone wasn't able to connect to channels 12-13. But now when N doesn't work at all this fix doesn't help. It looks like the problem lies deeper now.
2. Messing with wpa_supplicant. Works... sorta. I've replaced stock wpa_supplicant file with this one: http://forum.xda-developers.com/showthread.php?t=2399391 . It kinda works after that but starts acting up further down the line. E.g. it connects to a N network and everything's cool and dandy BUT when I leave my home and wake up the phone somewhere else I see that it still thinks it's being connected to my home network. It sees the other networks around it at the moment but it doesn't want to choose them as it kinda connected to my home one. Which is nowhere near. And if I get back to my home with the phone in such state - it won't continue to exchange data over my Wi-Fi network. So to fix that I have to turn wi-fi off and then on again but I don't like such a behavior since in my town there are a lot of free wi-fi hot spots around (in public transport, at bus stations, in cafes, etc) and I'd like my phone to choose and connect to open hot spots automatically.
So could someone please shed some light on how all this restricting thing works, what mechanism is responsible for available Wi-Fi modes except region code field in the databases and how do I fix that? (or break it?). I mean the second fix is almost works but it looks like wpa_supplicant wasn't hacked properly. Maybe there are other wpa_supplicant files available?
Thank you!
Edit: forgot to mention that I'm talking here about Xperia S, firmware versions are: JB .200, .211, .96

The same problem with my xperia ION from Syria , i try many APPS to change region code but no luck , and then change wpa_supplicant file but i face same your problem and i am suffering of about this problem , and i already change my rom from 211 to 96 and the problem still .

ahmedalmulki said:
The same problem with my xperia ION from Syria , i try many APPS to change region code but no luck , and then change wpa_supplicant file but i face same your problem and i am suffering of about this problem , and i already change my rom from 211 to 96 and the problem still .
Click to expand...
Click to collapse
Yea, I saw few people here from Syria and from some other African countries also and they all had similar problem. Although I didn't know anything about legal status of Wi-Fi N bands in Syria so I've decided to create a new topic.
It looks like this problem is quite wide-spread and before Sony officially acknowledges it, I hope we'll get some help from devs around here. I wonder if the devs actually look through troubleshooting branch of forum. Something tells me they don't.
I mean if there are fixes available it shouldn't be too hard to modify something in the system to get that damn thing working. This wpa_supplicant fix is especially interesting but I can't find any tutorial on how to edit it. Google keeps silence.

Did you find any solution for this problem , because I try many article but no luck .

ahmedalmulki said:
Did you find any solution for this problem , because I try many article but no luck .
Click to expand...
Click to collapse
No man, still nothing. I've put my hopes on Sony, thought they will update. Looks like I was wrong

[Q] How to connect to hidden WiFi?

Hello xda community!
I have a strange and serious problem: I can't connect to hidden WiFi's.
I'm with a LG G3 D855 10H (no newer versions available).
At work we use a hidden WiFi without password but with Juniper VPN.
When I type in the network name and save it, it tries one time to connect, then my LG G3 shows "not in range". After a few seconds, the WiFi is on the top again with a very good signal.
When I try to connect again, it shows "not in range" again and so on.
I tried it at home and created a hidden network and it was reproducible.
Anyone else has problem with this?
Many thanks in advance for your help!
Best regards,
Jake

Jake2kOne said:
Hello xda community!
I have a strange and serious problem: I can't connect to hidden WiFi's.
I'm with a LG G3 D855 10H (no newer versions available).
At work we use a hidden WiFi without password but with Juniper VPN.
When I type in the network name and save it, it tries one time to connect, then my LG G3 shows "not in range". After a few seconds, the WiFi is on the top again with a very good signal.
When I try to connect again, it shows "not in range" again and so on.
I tried it at home and created a hidden network and it was reproducible.
Anyone else has problem with this?
Many thanks in advance for your help!
Best regards,
Jake
Click to expand...
Click to collapse
I've got the same problem.
My problem was resolved

rayan96 said:
I've got the same problem.
My problem was resolved
Click to expand...
Click to collapse
Now that is what you call a 'special' post!
Would you care to explain how it was resolved for the people that have the problem.

My problem still exists, but isn't urgent anymore.
I found out, Android itself have problems (or restrictions?) to hidden WiFi networks.
I also found an app names HiddenSSID Enabler, but it seems it didn't work for me (or G3?).
If someone has a solution it still would be very helpful fo rme and the rest of the community.
// Jake

I have logs posted in my first post, WIFI DESTROYED TWICE or there abouts.
I've had to resort to DATA and its killing me haha i think i am getting close to fixing it, well i think i may be closer than you two and can one of you kindly take the lead as im reinstalling windows and i haven't gamed in 6 days :|
/system/etc/wifi/WCNSS_qcomcfg.ini
then the problem is complex but i am sure it is something to do with gEnableApProt=1
Offshoot fix, reinstall using googled imei number that doesn't have a flag or some how fix the flag <READ A FEW DAYS BACK>
I think actually the program that stuffed me was Airmon by maxters. It asked me if i was pro and of course, i said yes. Who would simply click no? I know a ninj wouldn't click no. I think there is a manual reinstall to link to it again i find the modem in its own partition having a chill, most likely trojan/backdoor and pwning everything around me.. I had three encrypted vpn backdoors and escalated accounts on my computer I paid the 5$ for the binarys, i think i paid 5$ for the back doors.
Not to sell Airmon out though.. Rooting our phones and accessing countless forums and websites really does leave us rather "xposed" some other cuplrits may be dsploit, ROM manager, linux Deploy/kali, Pamn IP scanner, system app remover pro, busybox pro's (Stephen/JRummy) or CMinstall/accessing the forums and trying to install cynagenmod / twrp recovery. I'm probably going to go with..... Airmon/Linuxdeploy or uninstalltool. But may have just been my IP logged and i hit a booby trap script along the way.
You guys done anything of the sort?
/Thread killller

Neither I understand what you are talking about, nor am I (as not native english speaker) good at "sentence guessing".
I have a rooted phone - of course.
But I'm pretty sure my WiFi is not destroyed...

OTA update and factory reset - Lost mobile connection! HELP!

Hi all,
having had the malware come through in the recent OTA update, I decided to do a factory reset to get all my data off quickly before any of it went to someone it shouldn't. Before the OTA the phone was working perfectly!
Unfortunately, after that, I have not been able to get connected to 3 Mobile (UK) although it worked before. I get the "Can't connect to this network right now. Try again later." message.
I've flashed a variety of ROMS, from old stock, to new stock, to Eragon.....none of which allow me to get on my network.
Wifi works fine.
The IMEI did disappear, but I was able to follow instructions online and manually reinsert them successfully.
I wonder if I have somehow knocked out the RF frequencies as I did not know I needed to make a backup of these.
ANY help you can give me to rescue what is a pretty decent phone (let down by Elephone's software!) would be great.
Thanks!

I have never had this problem thankfully so I am not sure what you should do but the video in the link below may help?
https://www.youtube.com/watch?v=qnJr7RQa2Kk

Some progress - oddly enough I tried restoring the IMEI numbers to the opposite SIM sockets and now the RADIO setting declares that it is on.
I think this is because it is a very early version of the phone and perhaps the SIM labelling was the wrong way round. Who knows.
I've attached some screenshots of what seems to be going on right now. Any ideas? Anyone?

I can get the phone to connect to 4g, but it will not connect to 3g/2g.
What do I do now?

Cooperuk said:
I can get the phone to connect to 4g, but it will not connect to 3g/2g.
What do I do now?
Click to expand...
Click to collapse
Glad you have managed to sort of sort it. For 3g have you selected that in mobile data settings?

It was a hardware issue - opened the phone up and the antenna connector had come away from the motherboard. Must have happened when in my missus' handbag (her phone - not mine!).
All solved now.
Might be worth others checking their antenna if having the same issues. Under the plastic cover is a little rubber 'knob' which puts pressure on the connection. I don't think the back was screwed down hard enough to keep the correct pressure on the connector.

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.