Develop Bugs

[Q] Problems with Mobile internet

I am facing a very peculiar issue that makes my mobile internet dysfunctional. Whenever I switch from 2G/3G to WiFi and then switch back to 2G/3G from WiFi, the internet refuses to work unless I restart my phone. Once, the phone is restarted, it works like a charm again till the time I switch to WiFi again. Sometimes though, 2G/3G would not work even if I do not switch to WiFi. Also, rarely, it still may work even as I switch back from WiFi to 2G/3G. This issue has plagued me since a long time and is sometimes accompanied by call drops.
I took my phone to a Samsung Service centre but it wasn't of any use. They do nothing except reflashing the stock rom. It did fix the problem for a while but in an hour or in a day(or in some random time duration) the problem resurfaced. I took my phone to the service centre, just to get this problem fixed. I have tried switching between different modes in settings: GSM/WCDMA/auto etc
I also tried contacting my mobile carrier and got my sim card changed. Therefore, the mobile carrier is not at fault (Internet works flawlessly after I restart, remember?). How do I fix this? It is really irritating to restart the phone every time I need to use the internet. Please help! :-/

Maybe try flashing a different modem. I had various data and call issues on my i9300. After flashing 10 or so different modems I found one from aveuropean carrier worked best. Im in the uk btw
Sent from my GT-N7105 using xda app-developers app

Thanks for replying thedadio!
But I've never flashed a modem before and have no clue which one to choose. Is it same as flashing a custom rom? Also, can I brick my device while flashing modems?

Yes its similar to flashing custom ROM. What ROM are you on and what modem are you on?

McLaren__F1, I am on stock 4.1.2. Also, I just tried flashing DDALJ1 modem (As I'm from India) and Perseus kernel. None of these steps helped me in any way. Still the same issues. :-/

Which is your network provider? I had the similar problems when I was on docomo..nw ported to airtel nd problem solved.
Btw did you try some other np's sim?
Sent from my GT-N7100 using xda premium

I am currently using Airtel (Prepaid). I haven't tried using any other np's sim though..

I have the exact same problem. I am with optus Australia. I tried different modems, different ROMs but all have the same problem. I have sent mine away to be replaced and am still waiting for the new one. Very frustrating problem.
Sent from my Nexus 7 using Tapatalk HD

I'm not sure if they'll replace mine. It has been almost 6 months since I bought it..
How do I solve this? Any clue anyone? :|

My Note2 does this sometimes & only fix is a restart.

try soft format may its helpful

Not a fix, but toggling airplane mode on and off does the job for me.
Interestingly this happens to me only when leaving one particular WiFi access point.

Randomwalker said:
Not a fix, but toggling airplane mode on and off does the job for me.
Interestingly this happens to me only when leaving one particular WiFi access point.
Click to expand...
Click to collapse
i got exatly same proplem, 3g not working after leaving wifi of my workplace, but when im home i have no proplems if i decide leave my home network.
could it be related to radio type wifi has?? my workplace still using old hardware with radiotype of .g and leaving that network "kills" mobile network and i need to reboot phone, but my home network is .n and im not having proplems after leaving it. if its related to wifis radiotype it should be easy for someone to write script which reboot mobile network after leaving those wifi networks.

Not a fix, but toggling airplane mode on and off does the job for me.
Interestingly this happens to me only when leaving one particular WiFi access point.
Click to expand...
Click to collapse
Doesn't work for me. This problem is strange. :-/

No one has a solution for this problem on XDA?

Did you use the NFC to scan anything by any chance? I don't know if it could be related but my phone started to have issues around the same time I bought some NFC tags and started programming and scanning them.
I still haven't got my replacement phone back yet. But I'll let you know if it still has issues in my problem spots. Than we'll know if the problem was with the phone or just this model.
Sent from my Nexus 7 using Tapatalk HD

essense said:
Did you use the NFC to scan anything by any chance? I don't know if it could be related but my phone started to have issues around the same time I bought some NFC tags and started programming and scanning them.
I still haven't got my replacement phone back yet. But I'll let you know if it still has issues in my problem spots. Than we'll know if the problem was with the phone or just this model.
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
Nope! I haven't used NFC at all.
Ohh, okay..Eagerly waiting for your response! *Fingers crossed*

Tested replacement phone today and the problem seems to be gone. The signal was actually stronger than all my previous phones.
This issue could be a hardware problem as from what I have searched on the net it seams to affect only a few people. I just hope if I root the phone the problems don't come back.
Maybe you could try send it away for repair if they won't replace it.
Sent from my GT-N7105 using Tapatalk 2

Looks like I spoke too soon. The issues are still there. While waiting for my replacement phone I was using an old HTC wildfire and had no issues with the data connection so it must be an issue with this model.

N2 wifi problem: network disabled. poor connection

Hi. 2 days ago my note 2 suddenly stopped connecting to the internet. i get the message "network disabled. poor connection". i have tried many different wireless (public, home, work, parents, friends) with the same resault. first i tried a factory reset to see if that fixed the problem, but it didnt.
the phone were at that point on the first german 4.1.2 version, so i decided to install the latest firmware for Nordic countries (since im from Norway) to see if it would fix it. but still the same problem.
today i tested my wifes S3 to see if she had the same problem, and she did. so now both our phones are without internet. does anyone have an idea on how to fix it? should i try a different 4.1.2 version for another country or should i downgrade to 4.1?

Same problem me s3 any solution.?
Sent from my GT-N7100 using xda app-developers app

tasaran said:
Hi. 2 days ago my note 2 suddenly stopped connecting to the internet. i get the message "network disabled. poor connection". i have tried many different wireless (public, home, work, parents, friends) with the same resault. first i tried a factory reset to see if that fixed the problem, but it didnt.
the phone were at that point on the first german 4.1.2 version, so i decided to install the latest firmware for Nordic countries (since im from Norway) to see if it would fix it. but still the same problem.
today i tested my wifes S3 to see if she had the same problem, and she did. so now both our phones are without internet. does anyone have an idea on how to fix it? should i try a different 4.1.2 version for another country or should i downgrade to 4.1?
Click to expand...
Click to collapse
Sounds like the problem is not with the phones but with the network. you can try waiting a while to see if things improve, or else do a power-down reboot of your router AND your phones to see if that will solve the problem.

Reboot your device first off. Check if other devices can connect to said network. Worst case reboot your internet equipment (router/modem). Failing all that are the phones rooted? If so try a different radio

Gsm Nexus No Service

Hey guys i have a galaxy nexus that is rooted and on cm11 rom baseband is 19250UGLL1 radio this phone always lose reception right now i am at work and my phone says emergency calls only. is there anyway to fix this guys? Thanks

sofia-captivate said:
Hey guys i have a galaxy nexus that is rooted and on cm11 rom baseband is 19250UGLL1 radio this phone always lose reception right now i am at work and my phone says emergency calls only. is there anyway to fix this guys? Thanks
Click to expand...
Click to collapse
I have the same problem, every now and then it will stop having service and the only way to get it back is by rebooting, sometimes it works at first sometimes it needs a couple of reboots.
Any hint with this would be great
(this happened to me with aokp and cyanogenmod)

Willyfrog said:
I have the same problem, every now and then it will stop having service and the only way to get it back is by rebooting, sometimes it works at first sometimes it needs a couple of reboots.
Any hint with this would be great
(this happened to me with aokp and cyanogenmod)
Click to expand...
Click to collapse
I have the same problem but it stopped having service at all, and it's not a sim card problem (the same simcard works in another phone)

Check if your IMEI is valid

lkeops said:
Check if your IMEI is valid
Click to expand...
Click to collapse
Yes, I have a valid IMEI. Sorry to take so long to answer

lkeops said:
Check if your IMEI is valid
Click to expand...
Click to collapse
same problem and i'm having invalid imei

im having almost identical problems... like a month or 2 ago i reflashed to the new 4.3 slim rom. I have been fighting this thing every since. Ive tried so many different radios but yet i still have this issue, sometimes i can go days without problems but now it seems to loose data even sooner. ONLY way i get data (4G) back is if i reboot. Ive tried disabling then re-enabling data, same for airplane mode, nothing works. I think part of the problem is this damn rom.... i used to be on black bean 8 and for the mobile networks it had an option for "CDMA/LTE". This rom must be a ported rom cause the only selection for mobile networks that work is "CDMA/EvDo/GSM/WCDMA". I am on Sprint CDMA and LTE. i dont understand why this was done like this. I Would like to go back to blackbean 8 but i had problems with it and i like some of the settings for this rom better. Anybody have any ideas? Ive tried ALL the radios, none seem to be stable.
oh and i would post in there for the rom's forum but seeing as i havent posted enough here im not able to ask questions about it or anything :-/

[Q] Major WiFi issue out of nowhere?

Hey all. I need some advice. This morning my G3 (D850) dropped WiFi connection for no reason. It says the signal is good but the network info says saved, secured. It will attempt to connect over and over again and if it does connect the signal is weak as can be and it drops the connection within 2 seconds. My coworker has a G3 also and is connected to the same work network I am. His connection says excellent where as mine said good. His device connects just fine with full bars. I'm baffled. I've already tried manually selecting 2.4 Ghz and 5 Ghz instead of auto select and that didn't help at all. I've tried manually turning off WiFi and turning it back on. I've tried turning airplane mode on and then off to refresh the connection and that didn't help. I've done a battery pull as someone in one of the android authority forums suggested that (apparently I am not the only one having this issue.), didn't work. I've unchecked WiFi optimization - no dice. There was another post on a different forum here on XDA that said turning off WiFi and then deleting the WiFi config folder located in data/etc/wifi and then rebooting fixed the issue for them so I tried that. After reboot when I tried to turn on WiFi my G3 rebooted itself. Does it everytime. SO, I had to restore to a nandroid backup (btw I'm on rooted stock 10f) to get the phone to stop hating my WiFi toggle attempts. Last ditch effort I did a factory reset hoping for an easy fix... Nope. I don't know what else to try. It was fine yesterday all day. This morning it was perfectly fine and then randomly started having this issue. I haven't altered any system files whatsoever. I really don't want to send my device to LG for warranty replacement so I'm hoping someone can help me out that may have had this issue and resolved it. The only difference between my device and my coworkers device is he is still on 10d and I am on 10f. That could be the issue I guess but that doesn't really explain why my device has been perfectly fine until this morning and I've been on rooted 10f for weeks. I am planning on flashing back to straight bone factory stock 10d when I get home here in a few hours from work but Idk if that will help or not. Judging from the amount of google search results of "LG G3 WiFi connection problems" this seems to be an issue for several people. I won't know if it's on the software side or hardware side until I get home but in the meantime has anyone had these issues at all? People have had success in changing to Static IP but I would have to do that for every connection I attempt to connect to and that's a pain in the a$$. Also, that does nothing to identify the root cause of the issue. Any help would be greatly appreciated. =)

BreakingVZW said:
to much words
Click to expand...
Click to collapse
try deleting /data/misc/wifi then reboot, it that doesn't work try an other kernel(rin kernel is good)

suljo94 said:
try deleting /data/misc/wifi then reboot, it that doesn't work try an other kernel(rin kernel is good)
Click to expand...
Click to collapse
Thanks for the reply. So it turned out my phone just randomly decided it doesn't like my work network anymore. Idk why lol. I got home and it hooked right into WiFi. Gf's WiFi and open networks as well. I call shenanigans. I went ahead and flashed back to 10d anyway though.

BreakingVZW said:
Thanks for the reply. So it turned out my phone just randomly decided it doesn't like my work network anymore. Idk why lol. I got home and it hooked right into WiFi. Gf's WiFi and open networks as well. I call shenanigans. I went ahead and flashed back to 10d anyway though.
Click to expand...
Click to collapse
I am having the same issue! But it is happening in other networks too...sometimes I get the phone to connect but it only works for a while and when I check the networks it only says Saved, even if I try to connect again

Having the same issue, whether at work or home, my wifi has become near useless. I've even gone as far as trying a different ROM. Didn't work.

Same thing here

I also have tried factory reset, installed a new ROM, changed settings in my router... but the problem remains I don't know what to do anymore, I use wifi a lot!! I searched through other topics but no one seem to know how to solve it. Unfortunately my warranty already expired, I took my phone to some technicians but honestly it didn't help at all...they all said it was a software bug and I should wait for an update but if it was just that a new ROM would fix it,right?
I am not very familiar with phone hardware but I assume that if it was a hardware problem I wouldn't be able to turn it on or connect to any network, right?? (any experts here???)
Any solution is welcomed.

anyone please?? :crying:
P.S : I tried a new baseband, new kernel and new ROMs. So far, nothing changed.
I can connect sometimes but get kicked out within minutes. At other times I only get the saved,secured message.
This is happening in every network

No Call Audio

Hello, im on cm 12.1 and recently i have no call audio, calling works fine on facebook and the like, but not when im calling someone from my contacts , ive tried factory reset, flashing different rom , back to stock and nothing works ,can someone help me???

dpwguenther said:
Hello, im on cm 12.1 and recently i have no call audio, calling works fine on facebook and the like, but not when im calling someone from my contacts , ive tried factory reset, flashing different rom , back to stock and nothing works ,can someone help me???
Click to expand...
Click to collapse
Need more info....download samsung phone info and post a screenshot of the firmware tab. If your bootlader and baseband dont match, theres your problem. If they do, try reflashing stock (twice) then doing a tactory reset from the stock recovery right after. If after that the issue is still present....probably something else.....mabey hardware related. Good luckl

Do you use bluetooth? I had a very similar problem and figured out that the only time I had call audio was when I was using a bluetooth headset or the bluetooth in my car. I don't know what sets it off but I've done some searching on this problem and it appears to be common among GSM GS4 owners, and even doing stuff like a complete reset doesn't fix it.
The one fix that I did find, that helped some people, was to go into Google Now and disable "Okay Google" detection from any screen. Several people found that that worked. But I didn't have that feature enabled anyway so it didn't apply.
I don't know if the same problem occurs with CDMA GS4s; my wife has a Sprint GS4 and doesn't have the problem but that doesn't mean it doesn't exist. I think it was just AT&T and T-Mobile GS4 owners who reported this.

lordodin912 said:
Need more info....download samsung phone info and post a screenshot of the firmware tab. If your bootlader and baseband dont match, theres your problem. If they do, try reflashing stock (twice) then doing a tactory reset from the stock recovery right after. If after that the issue is still present....probably something else.....mabey hardware related. Good luckl
Click to expand...
Click to collapse
My bootloader is nb4 and baseband is foh3, but it's been that way for a while now, and this problem is only recently, also I've tried that and it didn't work
Sent from my SGH-M919 using XDA Free mobile app

Mama Luigi said:
Do you use bluetooth? I had a very similar problem and figured out that the only time I had call audio was when I was using a bluetooth headset or the bluetooth in my car. I don't know what sets it off but I've done some searching on this problem and it appears to be common among GSM GS4 owners, and even doing stuff like a complete reset doesn't fix it.
The one fix that I did find, that helped some people, was to go into Google Now and disable "Okay Google" detection from any screen. Several people found that that worked. But I didn't have that feature enabled anyway so it didn't apply.
I don't know if the same problem occurs with CDMA GS4s; my wife has a Sprint GS4 and doesn't have the problem but that doesn't mean it doesn't exist. I think it was just AT&T and T-Mobile GS4 owners who reported this.
Click to expand...
Click to collapse
I don't have Bluetooth, I've tried it with a wired headset and even that didn't work, but what's so puzzling about this is that my calling works fine with Facebook messenger calling feature, hangouts and things like that
Sent from my SGH-M919 using XDA Free mobile app

Edit:
Nevermind. It worked twice then I tried calling a different phone and it broke again. I will keep searching and update.
Original:
I have had this issue intermittently for the past year. It was fixed for about 6 months then two weeks ago started occurring again. Today I flashed a new Rom (PacMan) and the M919UVUFOK3_M919TMBFOK3_TMB firmware. That did not fix it. I was connecting to a 5Ghz WiFi so on a whim I forgot that network and made a call without WiFi enabled. Call worked!
So I connected to my 2.4Ghz WiFi and it is working again. I would try turning off WiFi and see if your calls go through if so it could be 5Ghz or the router...maybe a forget network / reconnect to network will fix it consistently.
Hope this helps you and if anything new comes up I will let you know.

So an update. I finally just gave up on it. My wife had an old phone I remembered (from 2 - 3 years ago) that was ran over and the digitizer broke. I just took her guts and put it in my phone and now it magically works. Hopefully it stays that way.
Should have done this years ago as my phone would no longer charge with the USB Cable nor was my SD Card accessible. Now it is all functioning right again.

dpwguenther said:
My bootloader is nb4 and baseband is foh3, but it's been that way for a while now, and this problem is only recently, also I've tried that and it didn't work
Sent from my SGH-M919 using XDA Free mobile app
Click to expand...
Click to collapse
So after flashing stock NB4 twice.....and factory resetting after from stock recovery, your still not getting call audio?.....doesnt make sense....try again and make sure the bootloader and baseband match.....and dont reboot into download from the OS.

For anyone having issues with no call audio through cell service but for some reason it works through data calls through whats app or facebook messenger, etc ,i have been having the same problem for awhile now. I believe i have traced it to be a hardware issue with the middle frame, when looking at the phone with the battery cover open on the top right over by where there are two markings R1 and L1. There is a module there labeled J-AT TMGA 7-3. When i was having issues i noticed that if i put slight pressure on that module my audio would fade back in on the call but if i put too much pressure it goes away again. If it is a hardware connectivity issue it would explain why slunked was able to get his phone working again by changing the guts in the unit. Im currently waiting for a middle frame and a blue cable for the antenna to confirm if this is indeed the issue.