Develop Bugs

Network Connection Issue - No 3g/4g

OK, I have been dealing with this since I bought my GSII and cannot find any information about it.
Firstly I want to say that I am completely stock and unrooted.
My phone does not like to keep a stable data connection. About 50% of the time, when I try to do anything that requires a data connection (facebook, browser, gmail, etc.) the 2 arrows under the 2g/3g/4g icon will stick being grey and my phone just sits there "loading". I tried a factory reset, didn't install any apps, and also got a new sim card and the issue remains. It happens everywhere so it is not just a bad network connection.
I decided to post the question here because yesterday I was playing with my brother's GSII, and his did the same thing.. So it made me think that maybe it wasn't just me. Has anyone else experienced this? Or does anyone know what might be the cause?
Edit: I set my phone to use 2g only, and the problem vanished.. So it doesn't like to connect to 3g/4g.
Sent from my SGH-T989 using xda premium

Try going to your mobile network connection settings, choose access point names, hit your menu button and click "restore defaults".. It may fix it, I had data issues and it did the job. Hope it works for you!
Sent from my SGH-T989 using Tapatalk

Do what the gut above me said. Also call Tmobile and tell them, they will refresh your data connection on their end. That will clear up three problems your having.
But if it's also happening to your brothers phone, it's a network error. Call Tmobile.
Sent from my SGH-T989 using XDA App

munzik said:
Do what the gut above me said. Also call Tmobile and tell them, they will refresh your data connection on their end. That will clear up three problems your having.
But if it's also happening to your brothers phone, it's a network error. Call Tmobile.
Sent from my SGH-T989 using XDA App
Click to expand...
Click to collapse
I restored the apn settings and had Tmobile refresh my data connection, and it still happens. I noticed today that it's not just data, I'm also unable to call or text when it happens.. Tmobile just said everything tested normal so there is nothing they can do.. And I really don't think it's the phone so I don't want to exchange for a refurbished unless I have to.
Sent from my SGH-T989 using xda premiu

Its happened to me before. For about a week, the data connection just dropped. It would come back for a bit and later vanish. I called t-mobile and they guided me through routine steps (i.e. taking the battery out, rebooting, resetting) but nothing seemed to work. They really couldn't figure it out and later told me to replace the SIM. I can't remember if they shipped me one or had to go to the store but either way that relieved the problem. This was on an HTC HD2.
That might not be the case with you though. At one point in time all the phones under my name lost data connectivity just as you explain. This really had no solution but to wait it out.

Towle said:
I restored the apn settings and had Tmobile refresh my data connection, and it still happens. I noticed today that it's not just data, I'm also unable to call or text when it happens.. Tmobile just said everything tested normal so there is nothing they can do.. And I really don't think it's the phone so I don't want to exchange for a refurbished unless I have to.
Sent from my SGH-T989 using xda premiu
Click to expand...
Click to collapse
Are you paying for teathering?

sgip2000 said:
Are you paying for teathering?
Click to expand...
Click to collapse
No I don't use tethering, my download speeds are too slow where I live.
Sent from my SGH-T989 using xda premium

you mentioned your brother's is doing the same thing, its probably not the phone, but rather the cell tower your connected to is fuggin up. Try going 5 miles from where you currently are and see if its still happening.

Network error
Sent from my SGH-T989 using XDA App

Just in case it's not a cell tower or network problem . . . My SGS2, purchased in October, had the same symptoms as the OP. After trying everything the OP did, and more, I came to the conclusion that the firmware on the phone was corrupt. I used Odin to flash the factory stock ROM & Kernel images (2.3.5 at the time). There was a definite improvement in the faltering/hesitant/fail connectivity problem at that point, but it was still very subpar. So I then also flashed, again using Odin, the baseband ("modem") image - I did it twice for good measure. The problem was finally immediately solved at that point and I had very prompt loading of webpages, etc. Still working fine months later (and even better with a custom ROM). See the thread entitled "[Q]Is there a "true" factory restore for T-Mobile Galaxy S II?" for help about the seemingly same symptoms/problem you (and your brother) are experiencing. If your underlying problem is in fact the same as mine (and the poster of the thread I cited) then it's apparently either a bad factory flash or a post-factory corruption occurrence that is causing your problem . . . the coincidence of your brother also having the same problem aside. Good luck!
Sent from my SGH-T989 (now on GingerSnap v1.21) using XDA App

[Q] phone unable to connect to mobile network

hello everyone,
I have my GSM galaxy nexus running aokp_maguro_milestone4 , 3.0.8franco kernel and xxkl1 radio baseband. I used to have no problems with my phone at all until I went on vacation to Spain (I live in Germany) in Spain I had signal but ever since I came back my phone has almost (in the time span of 48 hour it had maybe 1 hour of signal) constantly no signal from my mobile provider (BASE). I have tried reflashing the radio ( I had xxkl2 so I reflashed that and then flashed xxkl1), I have also tried turning phone off and on and leaving it 1 night without battery. any help??
thanks

Check your APN settings, if they are correct try to make a new APN profile from scratch.

checked apn and they were OK. made a new apn with values I found online and still no luck? should I maybe just restore everything to default and flash the stock from?

axjacosta said:
checked apn and they were OK. made a new apn with values I found online and still no luck? should I maybe just restore everything to default and flash the stock from?
Click to expand...
Click to collapse
APN settings are only for data. They do not impact signal.
Go to Settings->More->Mobile network settings->Network operators and either select "Select automatically", or pick one from the list.

Just a suggestion but maybe a whole different updated ROM flash might do the trick
Sent from my SAMSUNG-SGH-I727 using xda app-developers app

KangKilla said:
Just a suggestion but maybe a whole different updated ROM flash might do the trick
Sent from my SAMSUNG-SGH-I727 using xda app-developers app
Click to expand...
Click to collapse
Like using a sledgehammer to kill an ant! :laugh: That should work as well.

Lmao I know but sometimes its just what's up. He didn't mention the ROM he's using. If he's that worried about this then its definitely worth a try. Like I said, just a suggestion. No need to slay ants over it
Sent from my SAMSUNG-SGH-I727 using xda app-developers app

efrant said:
APN settings are only for data. They do not impact signal.
Click to expand...
Click to collapse
You are right, misread his whole first post.
Maybe it's time to cut back on the coffee until JB comes to save the day
Swiftkey'ed on my CM9 Galaxy Nexus

Hi guys,
So I am still having this problem, but an interesting thing happened. I decided to stick the sim card of my gf (she uses another carrier which supposedly uses the same infrastructure as my carrier) and I had full coverage. After that I changed the sim again and had coverage on my line, but after a couple of hours of bad coverage it just never found signal again.
So what on earth could possibly be wrong and what can I do to solve this problem?
I would consider a new ROM, but this doesnt seem to be the problem.

axjacosta said:
Hi guys,
So I am still having this problem, but an interesting thing happened. I decided to stick the sim card of my gf (she uses another carrier which supposedly uses the same infrastructure as my carrier) and I had full coverage. After that I changed the sim again and had coverage on my line, but after a couple of hours of bad coverage it just never found signal again.
So what on earth could possibly be wrong and what can I do to solve this problem?
I would consider a new ROM, but this doesnt seem to be the problem.
Click to expand...
Click to collapse
Maybe you should contact your carrier and get a new SIM or check if there is any known problems in your area.
Swiftkey'ed on my CM9 Galaxy Nexus

Data issues anyone?

for some reason i cant connect to my browser or anything using Data. i've flashed 3 different roms to see if i got the same results and still no data but everything else works fine Voice and Text.. and im in Orlando Fl. in case you guys were wondering

No Data
mackentosh said:
for some reason i cant connect to my browser or anything using Data. i've flashed 3 different roms to see if i got the same results and still no data but everything else works fine Voice and Text.. and im in Orlando Fl. in case you guys were wondering
Click to expand...
Click to collapse
I'm having the same issue, I didn't check this morning before I left Lakeland, but I'm near Lee and OBT and have no data on my Evo LTE. I am at least glad to see its not my ROM either.

:crying: im having the same issue. since i woke up about an hour ago ive noticed i have absolutely no data(west palm beach fl)... sprint has me on hold now

I spoke with Sprint and they said the network was down in Orlando and they are crediting my account for the down time.

Ok so it's not just me then but I'm calling to get my credit tho
Sent from my SPH-L710 using xda premium

I'm back online

Hearing stuff like this makes me wanna switch carriers.

Not sure if its just the carrier here. I've had this trouble on 2 different ROMs and the millisecond I wipe and re-flash I get data back. Some people have the same thing, others have not a clue in hell what were talking about.

Check your APN setting. Under setting- more setting- mobile network - APN.
What ROM are you on now?
If not call your carrier operator.
Sent from my GT-I9300 using xda app-developers app

amosljl1995 said:
Check your APN setting. Under setting- more setting- mobile network - APN.
What ROM are you on now?
If not call your carrier operator.
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
I don't have that option, task&ktoonsez aokp jellybean. Had problems on cm10 nightlies and this. This ROM is epic awesome but I can't not have data. I had stock ROM rooted on stock lf9 radio, never un-rooted and updated. Not a single problem for months. Put cm10 on and within the first week, no data. Re flashed, still none. Flashed all 4 radio versions, then lost phone service. Flashed aokp last Monday, good until I woke up this morning. Went to bed last night with 20mbps 4glte connection, phone never moved, woke up with no data. I can get 3g once every 2 hours or so at a bandwidth of .6kbps ( speed test certified).

Try calling your network operator. Or you can reflash stock firmware and see if problem persist.
But CM10 by default has a wrong APN setting (For me) and I just change according to the right one and it is perfect now.
But reflash stock.one and try.
-If I did help, hit the thanks button
Sent from my GT-I9300 using xda app-developers app

amosljl1995 said:
Try calling your network operator. Or you can reflash stock firmware and see if problem persist.
But CM10 by default has a wrong APN setting (For me) and I just change according to the right one and it is perfect now.
But reflash stock.one and try.
-If I did help, hit the thanks button
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
Called net op, reset connection with., otherwise... no help. Also I know nothing about apn's, however there was an APN update in the last change log. When I say I know nothing about apn's, that's literal. I don't even know what the acronym stands for.

sprint
pimpitout007 said:
I spoke with Sprint and they said the network was down in Orlando and they are crediting my account for the down time.
Click to expand...
Click to collapse
My friend is having a lot of issue with data in NJ with sprint. Maybe the they are testing LTE which is causing issues?

Data is back. titanium backup of user apps+data, backed up the built in launcher to SD, wiped, flash, gapps. Data working and phone is like I never left. Going to use all of the dev logging and track what I do day to day to see what the hold up is here.

No idea then....
Sent from my GT-I9300 using xda app-developers app

Call to action!
mackentosh said:
for some reason i cant connect to my browser or anything using Data. i've flashed 3 different roms to see if i got the same results and still no data but everything else works fine Voice and Text.. and im in Orlando Fl. in case you guys were wondering
Click to expand...
Click to collapse
TO ALL!!!! this is a call to action. I too, like many others are experiencing unacceptable data speeds while on 3G and in great reception while using the Galaxy S III. the speeds I should be receiving are 1.5-3 MB/s but instead I am receiving around 128Kb/s in the city and within excellent service. We all have to pay a 'Premium Data Add-On' charges just to own these phones and this is unacceptable. Please write an Email to [email protected], vice president of customer experience at sprint and let him know what you are experiencing. Maybe if enough pissed off customers write, they will finally listen!

Getting no signal when calling.

Hello Everyone,
I am running the Virgin Rom with Ktoonsez.
I have been trying to find out the solution for more than two week but cannot find the solution. I got this strange problem in my phone, When I put my phone idle I get the full lte signal but however when i try to call someone all my signal get disappear but the strange thing is i can still talk to that person without the signal. As soon as i hang up my phone i would get all my signal back, when i get my signal back i can do normal browsing, watch video etc. I mean its no major issue, I was just wondering whether if there is any solution to get any signal bar back.

humritumri said:
Hello Everyone,
I am running the Virgin Rom with Ktoonsez.
I have been trying to find out the solution for more than two week but cannot find the solution. I got this strange problem in my phone, When I put my phone idle I get the full lte signal but however when i try to call someone all my signal get disappear but the strange thing is i can still talk to that person without the signal. As soon as i hang up my phone i would get all my signal back, when i get my signal back i can do normal browsing, watch video etc. I mean its no major issue, I was just wondering whether if there is any solution to get any signal bar back.
Click to expand...
Click to collapse
More device details please friend. What baseband are you on? NB4? If not, then you need to be on NB4 modem. If so, then it's possibly a kernel related issue I suggest flashing the latest build of Ktoonez kernel for AOSP, be sure to flash the right one for your phone. Example, don't flash the TouchWiz version
Sent from my SGH-M919 using xda app-developers app

Could also be APN settings
Sent from my SGH-M919 using Tapatalk

TSFox0317 said:
Could also be APN settings
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
For sure. I'm on C-Rom and I noticed the default apn settings were a little wacky. So after editing them, I'm running great with signal and of course free unlimited WiFi tether
Sent from my SGH-M919 using XDA Free mobile app

humritumri said:
Hello Everyone,
I am running the Virgin Rom with Ktoonsez.
I have been trying to find out the solution for more than two week but cannot find the solution. I got this strange problem in my phone, When I put my phone idle I get the full lte signal but however when i try to call someone all my signal get disappear but the strange thing is i can still talk to that person without the signal. As soon as i hang up my phone i would get all my signal back, when i get my signal back i can do normal browsing, watch video etc. I mean its no major issue, I was just wondering whether if there is any solution to get any signal bar back.
Click to expand...
Click to collapse
Sounds like it's working as it should! LTE cannot process phone calls so the device switches to 4g or edge depending on your area's reception. after the call is terminated, there is a very short delay, and you're reconnected to LTE (if there is reception for lte where you're at)
The device (depending on your settings) will try LTE, then 4G, then last resort to Edge when it's not on a call and just idling. It will connect when your device wants to access the internet or whatever, and selects the proper frequency (or mode) and use that for the connection..
check Settings/More Networks/Moble networks------ then under Network mode, you will see the connection choice.
if you tap on the network mode, it will give you different connection choices.
If you want LTE, you have only one choice and it downgrades itself as required as explained above.
you can save battery power by going to a lower frequency (like GSM only - which is edge Edge)
hope this helps you understand!
Aloha!

I want to flash the NB4 modem since im having the conection and do know how to use odin, just curious how to flash the modem as a .rar, I thought it had to be a .tar. so I felt it would be better to ask first before I brick my phone. I used the download for "Insane kit kat" I even unzipped it to find it still in .rar format

JORDVN said:
For sure. I'm on C-Rom and I noticed the default apn settings were a little wacky. So after editing them, I'm running great with signal and of course free unlimited WiFi tether
Sent from my SGH-M919 using XDA Free mobile app
Click to expand...
Click to collapse
How do I know what APN settings I should have?
Or if they are wacky?
Is there a guide?
Pp.
sent from my bluetooth controlled toaster that also takes pictures.

robandcathy said:
I want to flash the NB4 modem since im having the conection and do know how to use odin, just curious how to flash the modem as a .rar, I thought it had to be a .tar. so I felt it would be better to ask first before I brick my phone. I used the download for "Insane kit kat" I even unzipped it to find it still in .rar format
Click to expand...
Click to collapse
If you properly unzipped it and placed it in the phone slot of your odin program, you should be fine. Most people fail with either unzipping or placing it into the correct slot which in this case is the phone slot and not the PDA that you would use for a lot of other functions.
Sent from my SGH-M919 using XDA Free mobile app
---------- Post added at 09:54 AM ---------- Previous post was at 09:53 AM ----------
PanchoPlanet said:
How do I know what APN settings I should have?
Or if they are wacky?
Is there a guide?
Pp.
sent from my bluetooth controlled toaster that also takes pictures.
Click to expand...
Click to collapse
If you're running on T-Mobile, you should only see tmobile APN options available. Take a screenshot of all the available options that you have
Sent from my SGH-M919 using XDA Free mobile app

JORDVN said:
If you're running on T-Mobile, you should only see tmobile APN options available. Take a screenshot of all the available options that you have
Sent from my SGH-M919 using XDA Free mobile app
Click to expand...
Click to collapse
This is what I have.
Pp.
sent from my bluetooth controlled toaster that also takes pictures.

[Q] Strange behavior on Data

I have (purchased 4mo ago) Tmobile Note3 phone on prepaid tmobile unlimited $70 (with 4G LTE) with Kitkat. Sometimes even with 4-5 bars with 4G sign it looses the data connection. Browsers wont load pages, email client just trying to sync. Google play's circle spinning and spinning. Everything works again after few second/minutes and stops again later. I did a factory reset and didnt help. Anybody know whats going on here?

xda_rosh said:
I have (purchased 4mo ago) Tmobile Note3 phone on prepaid tmobile unlimited $70 (with 4G LTE) with Kitkat. Sometimes even with 4-5 bars with 4G sign it looses the data connection. Browsers wont load pages, email client just trying to sync. Google play's circle spinning and spinning. Everything works again after few second/minutes and stops again later. I did a factory reset and didnt help. Anybody know whats going on here?
Click to expand...
Click to collapse
+1, same thing is happening to me. Im trying to find out of we can flash a 4.3 JB modem while we are on 4.4 KK bootloader, and maybe it fixes the problem
---------- Post added at 11:18 PM ---------- Previous post was at 11:10 PM ----------
If someone has a flashable .zip file of a JB modem, please post it, thanks.

xda_rosh said:
I have (purchased 4mo ago) Tmobile Note3 phone on prepaid tmobile unlimited $70 (with 4G LTE) with Kitkat. Sometimes even with 4-5 bars with 4G sign it looses the data connection. Browsers wont load pages, email client just trying to sync. Google play's circle spinning and spinning. Everything works again after few second/minutes and stops again later. I did a factory reset and didnt help. Anybody know whats going on here?
Click to expand...
Click to collapse
It's a problem with the 4.4.2 kitkat update....apparently 4.4.3 is planned to fix that...I don't know the timing of that update though

louforgiveno said:
It's a problem with the 4.4.2 kitkat update....apparently 4.4.3 is planned to fix that...I don't know the timing of that update though
Click to expand...
Click to collapse
So is everybody with Kitkat having this problem?. Could you please show where it mentioned that it will be fixed in 4.4.3?

So we will have to wait for 4.4.3 update, anyone knows when will it be available?

Yes known problem with kit Kat.
I have it myself

xda_rosh said:
So is everybody with Kitkat having this problem?. Could you please show where it mentioned that it will be fixed in 4.4.3?
Click to expand...
Click to collapse
This article talks about the fixes in the 4.4.3 update.
http://www.i4u.com/2014/04/71701/sprint-releases-android-443-nexus-5

I have wondered the same thing, I'll have all bars but Web page won't load, can't load the play store. It happens a lot , more then just a hand full of times, but now I'm running with hyper drive rom and so far so good. We'll see.

I hope this issues would be solved next update

Ok guys, try this, go to your Mobile settings and change your APN's IPv6 to IPv4, its gonna help a lot.

slick4mitch said:
Ok guys, try this, go to your Mobile settings and change your APN's IPv6 to IPv4, its gonna help a lot.
Click to expand...
Click to collapse
how do you do that?

Try this
Settings > More networks > Mobile networks > Access Point Names
What to change? APN Protocol? or APN Roaming Protocol? Thanks!

Both, but is not a fix

slick4mitch said:
Both, but is not a fix
Click to expand...
Click to collapse
I didnt have any data drop from y'day after changing the APN. Data looks little bit slow though. But batter than dropping. Lets see how it goes.

I have mine set at both IPv4/IPv6 and I had a major improvement with all bars and poor speed.
Sent from my SM-N900T using xda app-developers app

Still the same after changing it

slick4mitch said:
Ok guys, try this, go to your Mobile settings and change your APN's IPv6 to IPv4, its gonna help a lot.
Click to expand...
Click to collapse
Many many thanks buddy.

Any updates or solution about this?

Do you need to have root acces for change the ipv6 for ipv4. I have all original and do not give me acces for to change the protocol to ipv4.
Sent from my SM-N900T using xda app-developers app

You have to make a new one.
Sent from my SM-N900T using xda app-developers app