Develop Bugs

[Q] Unable to connect to mobile network after using WiFi for some time.

I use my DHD for a lot of internet surfing. Usually i do it over mobile nework and it works fine. Sometimes though, i use WiFi for faster access.
After using WiFi for some time, if i again try to connect through the mobile network, it does not connect.
If i go into settings and turn on mobile network, it says turning on, and stays like that forever. If i press back and then come back into the network settings, the mobile network option shows as checked, but the status displays as "Connect to the internet". No icon is displayed in the notification bar, and i am not able to browse the net.
I have tried everything, switching to Airplane mode and back, turning WiFi on and off again, but nothing works. The only solution to this problem i'v found is to restart my phone. Once i restart, everything is back to normal (that is till i use WiFi again).
Has anyone else faced similar issues? Any suggestions for a possible solution?
PS: I am using unbranded, unrooted DHD with stock ROM (1.84.720.3)

I've noticed the issue a few times myself.
There seems to be no better solution other than to reset the phone.
I've only got it a couple of times and it doesn't seem frequent and so I don't really mind.
Similary I noticed that randomly the search networks feature freezes and after a few minutes reports that no networks were found, luckly, no reset is needed, only going back a couple of times and searching again
Hope someone else already found a solution to this and can post it!

Foladko said:
I've noticed the issue a few times myself.
There seems to be no better solution other than to reset the phone.
I've only got it a couple of times and it doesn't seem frequent and so I don't really mind.
Similary I noticed that randomly the search networks feature freezes and after a few minutes reports that no networks were found, luckly, no reset is needed, only going back a couple of times and searching again
Hope someone else already found a solution to this and can post it!
Click to expand...
Click to collapse
I was facing this problem only once in a while, and didn't mind much. But lately, i'v been facing this problem everytime i use WiFi, and it's really bugging me now.
I really hope someone has a solution for this.

The same thing is happening to me on my htc MT3G slide (not using wifi) after I flashed a ROM and updated the radio to the most recent one. Dunno why this is happening :/ It's the same rom (rooted version) and I updated to the same radio I had before. Restarting doesn't help either

I have got the same problem sometimes. And the easiest sollution is to turn to airplane mode and leave for few seconds. After that turn it off enter pin and everything back to normal. It have always worked for me.
Sent from my Desire HD using XDA Premium App

Data "stalling"

I don't really know to describe this problem better. I'm running CM10 (lately AOKP's latest build) with default kernels. I've flashed all the radios and tried a bunch of them in solid LTE coverage, I seem to have the same problem every time, which is the data seems to "stall."
It will show full signal, and then if i click a link, it will sort of just sit there, not really doing anything. Eventually it may load, or i give up in patience. Any one have any ideas?

eallan said:
I don't really know to describe this problem better. I'm running CM10 (lately AOKP's latest build) with default kernels. I've flashed all the radios and tried a bunch of them in solid LTE coverage, I seem to have the same problem every time, which is the data seems to "stall."
It will show full signal, and then if i click a link, it will sort of just sit there, not really doing anything. Eventually it may load, or i give up in patience. Any one have any ideas?
Click to expand...
Click to collapse
I am using at&t stock rom and not yet rooted. Even I have the same problem. Tried to disable and enable data from the notification but did not help. But, when I turn on the wifi, and turn off the wifi again, it works fine. When wifi is turned on phone disables the data and try's to connect to wifi or shows the available networks, but I don't connect and I turn off the wifi, phone reconnects to the at&t data again and then it works fine. Not sure why.

kk0813 said:
I am using at&t stock rom and not yet rooted. Even I have the same problem. Tried to disable and enable data from the notification but did not help. But, when I turn on the wifi, and turn off the wifi again, it works fine. When wifi is turned on phone disables the data and try's to connect to wifi or shows the available networks, but I don't connect and I turn off the wifi, phone reconnects to the at&t data again and then it works fine. Not sure why.
Click to expand...
Click to collapse
I can't even run a speed test because it just sits there. Web pages "load" but wind up stalling. Sometimes they finish, sometimes they don't. I have no idea what's causing it. What modem are you on?

eallan said:
I can't even run a speed test because it just sits there. Web pages "load" but wind up stalling. Sometimes they finish, sometimes they don't. I have no idea what's causing it. What modem are you on?
Click to expand...
Click to collapse
May be a good time to contact your cell phone provider for a replacement.

I was on a cross country road trip running CM9 on my GS3 and I kept running into the same thing. A temporary fix was to reboot the phone. Since I got back, I flashed SlimBean and I haven't seen the issue again.
In my case, I think its the SIM card. I used Google Maps/Navagation on my HTC G2 (using a micro SIM adapter) and my phone got HOT, I mean burn your fingers hot (upwards of 57 degC to 60 degC).
If it happens again I'm going to bring my SIM card back to ATT and have them replace it. I did some googleing and it seems like this is common with the Verizon variants of the GS3.

fortesquieu said:
May be a good time to contact your cell phone provider for a replacement.
Click to expand...
Click to collapse
That's the next step... it means reflashing, and waiting for samsung to fix it though, which sucks a lot.

ive had this same problem and it would piss me off! i found out that busybox was the culprit. i uninstalled busybox and cleard my cache in recovery and all was well once again. if any of yall have busybox installed you may look into my solution.

I recently been having this issue also. But mine is a little bit different. Like my phone will say I am connected to "H" for data but when I load a Page it slightly lags switches to H+ and boom Internet works. When I stall for more then 5 minutes it switches back. I'm not sure if it's some battery conserving feature or what but I have no problem against at.
Transmitted from my GALAXYSIII running Jelly Bean. XDA premium

[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.

[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

Question Z Fold 4: Losing Network Connection When On Home Wifi (ATT)

Hello all!
Got a weird problem, that at first wasn't much of an issue. But now keeps getting worse and worse.
I'm on ATT btw
I've noticed that when I'm on my home wifi, I will randomly have the following issues:
I can't send or receive phone calls
I can't send or receive text messages
Anything network related just doesn't work
It's very random, but happens frequently, and if I turn on airplane mode then turn it back off, the issue is resolved.
I've tried:
resetting network settings on phone
resetting my home network
soft restart and hard restarting phone
I've tried connecting a router to the stock ATT router and using that as my connection
Everything I can think of, short of reformatting the phone completely which I will probably try later this week
I'm on the latest firmware
When the issue happens, I can turn off wifi and it will show 2-3 bars of network but no lte/5g/5g+ or anything. And sometimes it shows the circle with a line through it.
Thanks!

xbrad said:
Hello all!
Got a weird problem, that at first wasn't much of an issue. But now keeps getting worse and worse.
I'm on ATT btw
I've noticed that when I'm on my home wifi, I will randomly have the following issues:
I can't send or receive phone calls
I can't send or receive text messages
Anything network related just doesn't work
It's very random, but happens frequently, and if I turn on airplane mode then turn it back off, the issue is resolved.
I've tried:
resetting network settings on phone
resetting my home network
soft restart and hard restarting phone
I've tried connecting a router to the stock ATT router and using that as my connection
Everything I can think of, short of reformatting the phone completely which I will probably try later this week
I'm on the latest firmware
When the issue happens, I can turn off wifi and it will show 2-3 bars of network but no lte/5g/5g+ or anything. And sometimes it shows the circle with a line through it.
Thanks!
Click to expand...
Click to collapse
Are you using an e-sim?
I have t-mobile with an e-sim and i've had this happen before. Ended up just restarting the phone.

apatcas said:
Are you using an e-sim?
I have t-mobile with an e-sim and i've had this happen before. Ended up just restarting the phone.
Click to expand...
Click to collapse
Nope, using a normal sim card from ATT.
Lucky a simple restart fixed it, I'm at wits end how to fix this issue....making work very difficult lol
Going to run phone without wifi today and see if the issue comes up off wifi.

Okay, so tested today without using wifi. And while not as frequent, it still did lose connection just now. And I had to toggle wifi off/on for it to regain connection....
Guess my last step is to reformat the phone

Just got the fold4 on T-Mobile and had the same issue over the weekend.
Randomly stops getting service, have bars but no data, sim says unknown. Disable then reenable sim and it works until next time.
Cleared cache, cleared network settings, remove and reinserted sim.
Today is my first day without losing network.

hamagc said:
Just got the fold4 on T-Mobile and had the same issue over the weekend.
Randomly stops getting service, have bars but no data, sim says unknown. Disable then reenable sim and it works until next time.
Cleared cache, cleared network settings, remove and reinserted sim.
Today is my first day without losing network.
Click to expand...
Click to collapse
Interesting, going to try some stuff tomorrow to see what I can figure out.
I was away from my house and had no issues, so starting to think maybe it's my location....but not sure.

Interesting, I've been getting this occasionally on my fold 4 with tmobile. I'll have apps that wont update data with a 'you're not connected to the internet' error. I recently added duck duck go browser and enabled the app tracking blocker. I've been wondering if the duck go vpn is the cause. Do you use any sort of vpn?

MovingZen said:
Interesting, I've been getting this occasionally on my fold 4 with tmobile. I'll have apps that wont update data with a 'you're not connected to the internet' error. I recently added duck duck go browser and enabled the app tracking blocker. I've been wondering if the duck go vpn is the cause. Do you use any sort of vpn?
Click to expand...
Click to collapse
Yeah I use ProtonVPN, used to use alwayson but ended up turning it off as it was interfering with my Tesla Key function. But whether it's on or off, I still get the issue.
I haven't reformatted my phone just yet, but the issue has reduced a bit the last few days. I'm not sold on it being my phone as this literally only happens while at home.....really bizarre honestly.
Also got an issue now with android 13 that it won't work with my Tesla half the time. It just doesn't recognize my phone as my key .-. really tilting xD

xbrad said:
Yeah I use ProtonVPN, used to use alwayson but ended up turning it off as it was interfering with my Tesla Key function. But whether it's on or off, I still get the issue.
I haven't reformatted my phone just yet, but the issue has reduced a bit the last few days. I'm not sold on it being my phone as this literally only happens while at home.....really bizarre honestly.
Also got an issue now with android 13 that it won't work with my Tesla half the time. It just doesn't recognize my phone as my key .-. really tilting xD
Click to expand...
Click to collapse
Thanks for the info. It's so intermittent it's very hard to pin down. I still haven't gotten the update to 13 so hopefully that helps you narrow your search some.

MovingZen said:
Thanks for the info. It's so intermittent it's very hard to pin down. I still haven't gotten the update to 13 so hopefully that helps you narrow your search some.
Click to expand...
Click to collapse
I've noticed it less with Android 13, but android 13 broke my Tesla Key functionality....so not sure that was worth the trade off xD
Yeah, I haven't been able to pin point any specific cause which is super annoying....

Well it lasted a day or 2 then happened a few times again.
As this was a new device for me, I noticed it wasn't "activated" on T-Mobiles site. I went through the activation process and that seems to have fixed it for me now (wifi calling too).
Likely unrelated to what you're experiencing but thought I'd mention it.

hamagc said:
Well it lasted a day or 2 then happened a few times again.
As this was a new device for me, I noticed it wasn't "activated" on T-Mobiles site. I went through the activation process and that seems to have fixed it for me now (wifi calling too).
Likely unrelated to what you're experiencing but thought I'd mention it.
Click to expand...
Click to collapse
That's interesting though, maybe I just need to go talk to ATT as much of a pain in the ass as it is -_-*