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

[Q] Fails to automatically connect to mobile data after Wifi

Does this happen to anyone else? Quite often if I've been using the N2 in my home, when I go out and about my phone will not be connected to mobile data (3G) and I have to toggle airplane mode for it to kick in?

tameracingdriver said:
Does this happen to anyone else? Quite often if I've been using the N2 in my home, when I go out and about my phone will not be connected to mobile data (3G) and I have to toggle airplane mode for it to kick in?
Click to expand...
Click to collapse
Not had this myself, sounds like the cellular connection is going to sleep and not waking when your note 2 polls for a connection. Are you on a stock rom or a custom, can you post your android version number as well, will help anyone else who posts who may have more information for you.
If your rooted you could try pulling a log at the time you switch connections see if that yields any useful data.

Same here on a german device. I use manually select the Provider. Then it connect. Thank you for the tip with the airplane mode. But I search a way to kick this big. In a german forum a member says that a Fullwipe helps.
sblock.de - GT-N7100 - Tapatalk2

Its a stock rooted ROM version JRO03C.N7100XXALJ1
Can anyone tell me what to look for in order to create a log? (I don't expect a tutorial just someone point me in the right direction).
The problem is intermittent.

tameracingdriver said:
Its a stock rooted ROM version JRO03C.N7100XXALJ1
Can anyone tell me what to look for in order to create a log? (I don't expect a tutorial just someone point me in the right direction).
The problem is intermittent.
Click to expand...
Click to collapse
Give this a go, should allow you to create a log during the time you have the problem then you can see what android is or is not doing at the time.
http://forum.xda-developers.com/showthread.php?t=1726238

Not something I have had myself but my gf has this same problem with her gs3. After having a look around our seems to be fairly common on the gs3 so any help with a fix would be great. I can only assume that it's something that will be fixed with a fw update from Samsung.
Sent from my GT-N7100 using Tapatalk 2

I have the same issue and so does my girlfriend on her SIII.. Can be really annoying as I might leave somewhere with wifi connectivity expecting the phone to automatically connect to 3g and I miss things like whatsapp messages with no warning :/
When I realise I do use the flight mode trick to fix it but it's annoying that it happens.
Sent from my GT-N7100 using xda app-developers app

androidizen said:
Give this a go, should allow you to create a log during the time you have the problem then you can see what android is or is not doing at the time.
http://forum.xda-developers.com/showthread.php?t=1726238
Click to expand...
Click to collapse
I've got Catlog now, next time it happens I'll open it up. Its behaved today mind.

I'd love to help but those l logging apps require root access on jellybean and I'm not rooted
Sent from my GT-N7100 using xda app-developers app

Hi,
Mine has thuis issue too. Hope new firmware csn solve it.
Sent from my GT-N7100 using xda app-developers app

Crawling internet over data & NO Downloading

Problem:
The speeds which I get over 3g are ridiculous!! can hardly access any website, everything keeps timing out !!
I can't even download a 300 Kb File !!
Be it over Google play or any other download using the browser, I just can't download Anything.
The download starts..downloading on the notification bar..after waiting for a couple of minutes, it times out ??
Is anybody else facing this problem??
Has it got something to do with the E-988 model ??
Tries:
1.Tried switching carriers(3 different ones)>>same issue with everyone of them
2. Used the 3g/4g optimizer app along with the 3g tweak script by Zepplinrox>>NO effect
3. Tried to find a copy so that i can flash a new radio for my E-988>>couldn't find one
4. Tried using GetRIL but it said my phone is not supported.
There is Absolutely no problem with either downloading/internet access while I am using WIFI, but as soon as I switch to data, it just dies out
Any solutions/suggestions would help out a lot..
>>Took my phone down to LG service center, they said it works just fine:laugh::laugh:<<

Numerous factors depict whether or not you get a good speed when it comes to data. Location, congestion, company and location again.

Jammol said:
Numerous factors depict whether or not you get a good speed when it comes to data. Location, congestion, company and location again.
Click to expand...
Click to collapse
Agreed man..but still, No 3G is that bad that you can't download a freaking 300 Kb file..
I assume that the radio is messed up..
waiting for someone to post native radios for Asia region..flash & try them out..

prabhjeet.oberoi said:
Agreed man..but still, No 3G is that bad that you can't download a freaking 300 Kb file..
I assume that the radio is messed up..
waiting for someone to post native radios for Asia region..flash & try them out..
Click to expand...
Click to collapse
Make sure you are using the correct APN`s
It might be a good while before those modems are posted things seem slow around here. Make sure you are actually on 3G as it says 3G at the top and not 2G/E right?

I use E988 too....and have no 3G problem so far.....

hyelton said:
Make sure you are using the correct APN`s
It might be a good while before those modems are posted things seem slow around here. Make sure you are actually on 3G as it says 3G at the top and not 2G/E right?
Click to expand...
Click to collapse
APN is correct for every SIM. The problem doesn't seem to be with the provider, its either a hardware issue or maybe a software issue.
I have 3 GSM micro SIMs from 3 different providers..
The GSM signal keeps fluctuating..1 bar to 5 bars(no issue with audio quality though).
Never ever seen a 3G icon on the phone, hardly get a HSDPA(H).
>>Googled stuff and tried to Force my phone to WCDMA only, started having network issues..
>>checked ur stuff on build.prop edit as well..tried that..Didn't help..
>>Have a HTC One X as well, 3G works like a charm on that..

It would have to be hardware. If it was software everyone else would be having the issue
Sent from my LG-F240S using XDA Premium 4 mobile app

hyelton said:
It would have to be hardware. If it was software everyone else would be having the issue
Sent from my LG-F240S using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thats the thing..I took it over to LG service center. They kept it over the weekend and said there was absolutely nothing wrong with the hardware !!
I told them it could be an issue with the receiver antenna (read it somewhere).
They said if that was the case then WIFI would be affected as well (which isn't).
I'm still confused.
Thanks for the input thiough..
will post if there is Any improvement.

same problem on f240s. wifi speed and stability is great, but mobile data is just way too slow.. i cant figure it out..
im usually stuck on "g", dont think i ever saw "3g" there.. the only thing that i think could be the problem is the 1900mhz frequency that my model doesnt have, but it has the 2100mhz frequency that my operator uses along with the 1900mhz frequency..
is there any way to resolve this? i saw some ways to convert the phone to e988. would thet help? i tried to alter things in the secret menu, but no luck. no setting worked except automatic..

*No signal strength after multiple flashes and recoveries

*No signal strength after multiple flashes and recoveries I have flashed multiple Touchwiz and Aosp Roms as well as restored the original stock firmware. (JediX20 and JediMaster + PacMan 4.2.2 and 4.3 + Stock Firmware Samsung 4.1.1 and 4.1.2 and even updated to 4.3 and downgraded back to 4.1.2) Nothing seems to work sometimes when I boot up ill have signal and my phone will work. Sometimes ill make a call while I have 3 signal bars or more and the phone will just be in dialing mode and after 10 seconds or so my signal will cut off and the call will disconnect saying there is no signal or "out of service area" and as soon as it hangs up my service bars reappear. And then there are times where the phone will show no signal strength at all for the whole time. In all instances data will still work. I have flashed and recovered through odin multiple times but I know the issue lies within the software I just dont know where. EFS maybe? I even thought it was in factory mode and downloaded titanium backup and deleted every "Factory Test Mode" I saw. Still no luck and im bout to the point im about to chunk it. Any ideas of why it is doing this? Any help would be much appreciated. A phone aint nothing if the basic functions of call text and web doesnt work.*I have also tried flashing K7 MA4 J2 and UCAMH3 Modems. None seem to help the problem.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

Possible on the EFS...but that file is really an all or nothing deal...
It is possible to have a bad antenna or radio chip....but I do agree with you on a software fix first...to include a custom APN setup with experimented entries...
I've also heard that arbitrarily bouncing between 4.1 and 4.3 roms does alter the partition structure slightly ...but after looking into the EFS on both frameworks....I've noticed they have the same size and the information is identical...
I wish that I had more help for you....g
Sent from my SAMSUNG-SGH-I317 using XDA Premium 4 mobile app

killacam1989 said:
*No signal strength after multiple flashes and recoveries I have flashed multiple Touchwiz and Aosp Roms as well as restored the original stock firmware. (JediX20 and JediMaster + PacMan 4.2.2 and 4.3 + Stock Firmware Samsung 4.1.1 and 4.1.2 and even updated to 4.3 and downgraded back to 4.1.2) Nothing seems to work sometimes when I boot up ill have signal and my phone will work. Sometimes ill make a call while I have 3 signal bars or more and the phone will just be in dialing mode and after 10 seconds or so my signal will cut off and the call will disconnect saying there is no signal or "out of service area" and as soon as it hangs up my service bars reappear. And then there are times where the phone will show no signal strength at all for the whole time. In all instances data will still work. I have flashed and recovered through odin multiple times but I know the issue lies within the software I just dont know where. EFS maybe? I even thought it was in factory mode and downloaded titanium backup and deleted every "Factory Test Mode" I saw. Still no luck and im bout to the point im about to chunk it. Any ideas of why it is doing this? Any help would be much appreciated. A phone aint nothing if the basic functions of call text and web doesnt work.*I have also tried flashing K7 MA4 J2 and UCAMH3 Modems. None seem to help the problem.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app
Click to expand...
Click to collapse
Are you really on straightalk like your profile says? Have you checked your APNs? You've been bouncing back and forth I'm wondering what's in there. Sounds like something in there is not happy.

dicksteele said:
Are you really on straightalk like your profile says? Have you checked your APNs? You've been bouncing back and forth I'm wondering what's in there. Sounds like something in there is not happy.
Click to expand...
Click to collapse
My apns are fine and have always worked. The problem is not with that but rather signal strength, being able to make and receive calls. Messaging and data work fine.

killacam1989 said:
My apns are fine and have always worked. The problem is not with that but rather signal strength, being able to make and receive calls. Messaging and data work fine.
Click to expand...
Click to collapse
My phone has always worked flawlessly until now. The signal can be normal but when I make a call it rings forever. .. the signal drops..my phone says it's out of service area and hangs up. .. and soon as it hangs up the signal bars reappear. .. in that specific order. It had never done that before until recently

killacam1989 said:
My phone has always worked flawlessly until now. The signal can be normal but when I make a call it rings forever. .. the signal drops..my phone says it's out of service area and hangs up. .. and soon as it hangs up the signal bars reappear. .. in that specific order. It had never done that before until recently
Click to expand...
Click to collapse
Well you can try this.
[RIL] AT&T I-317 UCALK7/UCAMC3 RIL Update Packages Collection CWM/TWRP Compatible
http://forum.xda-developers.com/showthread.php?t=2280462
What is RIL:
RIL is like a driver for the modem
Use the ATTI317UCAMC3RILRecovery.zip
Then grab the ATTI317UCAMC3ModemCWM.zip from here
http://forum.xda-developers.com/showthread.php?t=2274854

If a radio/ril package doesn't repair the situation for you...and a complete return to stock fails also....(stock contains radio/ril )...
Then you should consider a hardware repair...
The note 2 had antenna issues on some devices...g
Sent from my SGH-I317 using XDA Premium 4 mobile app

no signal
gregsarg said:
If a radio/ril package doesn't repair the situation for you...and a complete return to stock fails also....(stock contains radio/ril )...
Then you should consider a hardware repair...
The note 2 had antenna issues on some devices...g
Sent from my SGH-I317 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Greg,
Do you know where I can get details about the antenna issues. I searched several forums that pointed to the usb flex. I just replaced mine and still have the same problem of weak signal and constant signal drops.
Thxs

Thanks man ill try this out. Isnt there a way to just wipe the efs, system,data, dalvick, cache in TWRP and start fresh?

Do "NOT" wipe your EFS FOLDER...and do "NOT " re-partition your device in Odin either...
Simply use TWRP and wipe system ...data....dalvik...and cache...
Also ....you can wipe your internal storage as well if your important items are stored on the external SD....(photo's etc.)..
And as for the antenna question ...just Google it....g
Sent from my SGH-I317 using XDA Premium 4 mobile app

I was poking around in my efs folder and went to Factory Apps and found a factory mode script. I opened it up in RB text editor and found that the script said on so I assume that it being on must have had something to do with the call feature. I changed the script from on to off and saved it. Soon after I tried making a bunch of calls its been working flawlessly but in exchange the lockscreen will not show up nor does the option to reboot/power off/airplaine mode shows up. Im going to Keep testing the calls in the meantime.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

Im experiencing a problem nearly identical to yours. I have an i317 unlocked using a Tmobile SIM. Everything was working fine until I flashed a rom (I believe I accidentally flashed a rom with a Tmobile radio which boot looped the phone). After fixing the bootloop and flashing the cyanogen mod rom, I started experiencing the frequently dropped signal.
I have downgraded and gone back to stock several times which has not fixed the problem
After reading this thread I changed the factory mode script to off, but it doesn't seem to have affected the radio performance.
I remember reading that the partition could possibly be corrupted in a bad flash. What is the best way to reformat the partion?
Any help greatly appreciated

Did you reboot the phone afterwards?
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

Yea still no luck. But after about 3 days and a crapload of flashes I ended up flashing jedix20 and added the alexander theme..which suprised the hell out of me...the stock jedi had less signal bars like 1 or 2. I flashed alexander theme and my bars are from 2-4 with 4 being the best. Everything seems to be working. I had also did a test and made sure that my Network in setting was registered to the HOME network. That may have played a factor as to why the network wouldnt work even with signal bars. I flashed JediMasterX2 and ran across an issue like that. I flashed the att carrier files and it didnt work. Then I flashed the 7105 version and checked the Network operators and searched for a network. It pulled up AT&T and Verizon and when I chose AT&T and it registered my phone everything started working. I dont really like messing with the system files but I investigated the Jedimaster zip and looked under Jedi> carrier> att> and opened up the cscversion.txt under rb text editor and it showed an incorrect version. I317ATTAMA4....which im assuming was supposed to be I317ATTUCAMA4. Also under the SW Configuration. Xml the csc version was still the same. AMA4 it may be nothing but I would have thought it would have needed to match up. Ill have to look into it some more. I really want to update but hell idk. Might be done trying to flash roms on this device if everything works right
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

Would the phone having factory test and factory mode on the phone affect it any. I seem to have 2 factory mode apps with one being 560kb and the other 84kb. I don't know if those could affect the signal performance
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

Is your phone working now. Do you have details on what you did exactly. Thxs
Sent from my SAMSUNG-SGH-I467 using XDA Premium 4 mobile app

Sherio1000 said:
Is your phone working now. Do you have details on what you did exactly. Thxs
Sent from my SAMSUNG-SGH-I467 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Tbh. I honestly never got it to work right. I tried for months to get it to work right and to no avail. I ended up selling it and getting the note 3.
Sent from my SM-N9005 using XDA Free mobile app