SG II 2.3.4 losing data connection - Galaxy S II General

Hi All,
I am losing data connection every couple of days, it seems to happen when the phone swithces from WI-FI to 3G. I am on AT&T and what happnes is that the phone automatically swithces the APN to the MMS one and does not connect to the internet anymore until I switch back the APN. Pretty strange. 3g icon is there but the arrows dont get signal (green/orange)
The funny thing is also that I did not have this problem until I hard reset my phone because I had a spring board lag problem....that might be solved but I now have this one......anybody with the same issue?
Thanks

I am using the European SGS2, and it sucks on AT&T, although I have never had the issue you are describing.
If you do not mind, please post here any solution you find, for future reference.
thanks

I was having the same issue after I upgraded to 2.3.4.
Upgraded to 2.3.5 and it is gone.
If you don't want to upgrade. Then you can just flash the 2.3.5 modem and that should do the trick.

I have a similar problem, however my Wi-Fi disconnects randomly instead.

Also have the same problem. How can I flash modem? I know how to root and know the Odin. But how can I flash only the modem? BTW, my radio is "unknown". Need help.
Sent from my GT-I9100 using XDA App

Related

[Q] HTC data connection freezing.

Hello all,
Not sure if anyone else is having this problem.
First of all, better to mention what my Aria is running on:
Stock ROM unrooted. Updated to Froyo from HTC via FOTA. I'm not located in the US therefore my phone isn't under AT&T which many here are. My ROM is strictly HTC's Asia's ROM.
Now I don't have much in a way of problems with my phone, its just odd to me that every once in a while (around once every week or so) I need to reboot my phone. This is because for some strange reason, my phone won't connect to the data network (3G) or it shows that it is connected but no data activity (even after I've instructed the phone to sync all information, i.e. weather, emails, etc). I've tried switching on/off the data network connection and also have tried switching between airplane modes on/off (in hopes to reset something) but nothing works.
I'm not sure if this is an inherent problem to the Aria's 2.2 update or if there is something wrong with my carrier, however the problem is ALWAYS FIXED right after a fresh reboot.
Anyone have any thoughts on this?
*#*#4636#*#*
Phone information. Set preferred network.
Try switching between the different options.
Sent from my HTC Liberty using XDA App
Thanks for the hint thinkhope. I'll try your suggestion. May I ask what you think the problem may be?
Update: I tried it for a couple of days and I still get the same problem. I tried switching between preferred networks but the problem persists. Quick reboot and once again, fixed.
I also have this same problem, stock/custom ROM no matter which ROM the problem is still there, up to a point that made me wanna smash my phone on the ground. I tried to use my SIM card on my wife's SGS and seems like no such problems faced. Is this a common problem for HTC phones?

3g problems after 2.3.3 update

I guess im not the only one having problems with 3g after the 2.3.3 update. 3g seems to turn itself off after not being used for a little while, the only way i can get it working is by turning mobile networks off then on again. i so hope they fix this and other bugs that have arisen since the update.
I'm using custom rom and everything is great (Ardhd). Try changing the network mode to stay on 3g at all time, thus it will not switch between 2g and 3g.
Sent from my Desire HD using XDA App
everything is switched on as it should be, same as before the update. checked to see if i had done wot you said and was already on. i believe there have been issues with 3g but not really had the time to search the threads

[Q] Proplem with all 2.3 based roms

Hello. I have been using void until now. Sometime ago I tested Oxygen. I immedietly noticed a problem with connections. The phone had to be in roaming mode to get any connections at all. Even then I was only able to call and send txt but no internet was available.
So I switched back to void which worked like a charm.
Today I suddenly got the urge to try something new again. So I installed MIUI. The same problem exist with it as it did with oxygen. No internet connection what so ever. After furiously messing with the roaming mode button and a couple of restart the internet connection suddenly came to life. But it is extremely slow and it suddenly disconnects from time to time.
I have a model bought from finland and it was originally with saunalahti version of 135. Any help on how to continue using 2.3 based roms would surely be appriciated.
This is not rom problem. I used all roms and never ever had ANY of problems. ANY.
nioman said:
Hello. I have been using void until now. Sometime ago I tested Oxygen. I immedietly noticed a problem with connections. The phone had to be in roaming mode to get any connections at all. Even then I was only able to call and send txt but no internet was available.
So I switched back to void which worked like a charm.
Today I suddenly got the urge to try something new again. So I installed MIUI. The same problem exist with it as it did with oxygen. No internet connection what so ever. After furiously messing with the roaming mode button and a couple of restart the internet connection suddenly came to life. But it is extremely slow and it suddenly disconnects from time to time.
I have a model bought from finland and it was originally with saunalahti version of 135. Any help on how to continue using 2.3 based roms would surely be appriciated.
Click to expand...
Click to collapse
Let me clarify this once and for all. Android is a slightly different OS, it uses something called middleware, which acts like a bridge between the hardware and the drivers on each Rom.
Now going back to your B135, which is very old btw, you need to upgrade the Stock Rom to at least B137, which will upgrade your AMSS file. This way the Wifi/3G/screen/sensors modules get updated firmware and that should fix your connectivity problems with 2.3 drivers.
Saunalahti is MVNO and it roams on Elisas network so it's normal that you need to enable roaming. Stock ROM has modified RILs or something so that they recognise Elisas network as Saunalahtis and then you don't need to enable roaming. I tried getting those RIL work with Oxygen but those didn't fix it. Cyanogenmod has settings so you don't need to roam. (atleast you can get rid of that roaming symbol)
I don't understand why it works with Void and FLB, maybe those are based on some other MVNO's stock rom idk. Or does it work as it should on every Froyo ROM? Haven't tried other ones and really cba.
You can just enable roaming, you won't get any fees for that as long as you roam on finnish networks. (and it just roams on Elisa afaik)
nioman said:
Hello. I have been using void until now. Sometime ago I tested Oxygen. I immedietly noticed a problem with connections. The phone had to be in roaming mode to get any connections at all. Even then I was only able to call and send txt but no internet was available.
So I switched back to void which worked like a charm.
Today I suddenly got the urge to try something new again. So I installed MIUI. The same problem exist with it as it did with oxygen. No internet connection what so ever. After furiously messing with the roaming mode button and a couple of restart the internet connection suddenly came to life. But it is extremely slow and it suddenly disconnects from time to time.
I have a model bought from finland and it was originally with saunalahti version of 135. Any help on how to continue using 2.3 based roms would surely be appriciated.
Click to expand...
Click to collapse
This is a well know problem. As you know, Saunalahti runs on Elisa's network and when using 2.3 roms, operator is identified as Elisa, thus making the phone think that its roaming.
Some have tried fixin this, but nothing yet.
There is no harm enabling data roaming (international data roaming can be disabled from oma.saunalahti). Or by using CM7 which has an option for "national data roaming". That also removes the roaming icon...
sorry a lil OOT,
how about other features like usb tethering on 2.3.x?i see all gingerbread roms for huawei ideos x5 have issue on these.
is there any solution/workaround for usb tethering?
thanks

No internet on 3G

Im using MikG 3.0 and can only use internet with wifi or 4g. I do get the error message to turn on mobile network (which is checked). What is my next step? Thank all
Never had any trouble like that with MikG try reflashing.
Did you update your Profile and PRL after flashing? Try that, if not, try reflashing the rom. I've never had that problem on any rom.
no internet on3g
Hello Brentkhack, I'm on a desire HD but have had the same issue with 3g as you. It started working for me by simply switching the data toggle off and on again. I know u may have already tried this but after googling for over an hour I'd found nothing else to help me so thought I should post, Hope it works for u too.
Thanks, by turning the mobile data off then on fixed the problems.

Mobile Internet connection

Hi, sorry for disturbing, I have a weird connection problem and I am pretty sure it is not the internal antenna... When i use the phone for Internet, mail etc etc.... Everything goes fine it uses a 4G connexion and I almost never have a problem, I do have a problem Sometimes when I am not in a 4G covered area... Than i have to change the network modus to wcdma /gsm automatic because if I leave it on lte /wcdma /gsm the phone is jumping all the time between hspda /h/edge gprs... And this goes fast like that that connection fail... This problem stops when i change modus than I get a stable 3g connection.... A little bit disturbing but Okay..... The biggest problem is that I m always connected with my messenger services like for example WhatsApp.... When i have the phone in my hand no problem at all.... But when he stays on the table or in my pocket it is kinda weird.... Sometimes I don't recieve my messages and than suddenly when I pick up my phone I get like ten messages in once starting from like half hour before.... All this started like three weeks ago, network provider say there are no network problems, I didn't drop my phone or something... Internet connection is just acting very strange lately and this started before I updated to the official 4.4 rom and didn t change after...... I also have to tell that I don’t have problems at all with phone calls or texts messages..... It's just those two mobile Internet issues.... Since i m only good for using the phone and don't know nothing about the technical parts or something... I wanted to ask the question to all of you experts.... And wanted to ask for help and if possible a solution? I want to thank you in advance and hope you guys can help me soon.... Kind regards...
Sent from my GT-I9505 using XDA Premium 4 mobile app
Try different modem perhaps?
Hi thanks for answering.... Tried everything.... Still same two connection problems..... Only thing I didn't do yet was a hard reset.... Could this problem be caused by an application or a bad uninstalled application? Thanks in advance
Sent from my GT-I9505 using XDA Premium 4 mobile app
Steven.svde said:
Hi thanks for answering.... Tried everything.... Still same two connection problems..... Only thing I didn't do yet was a hard reset.... Could this problem be caused by an application or a bad uninstalled application? Thanks in advance
Sent from my GT-I9505 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Hmmmmm, highly unlikely from my point of view, but however there could be some apps locked into 2G or 3G or 4G connection.
Try how clean system doing, if it's same, consider it a hardware problem which there is nothing we can do about it...
samsung s4
i am having network issues
wifi works good
2g works good
3g/4g doesnt work at all no signal if i select these networks
is it a modem issue or kernel issue

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