[Q] Data connection drops on L7 - Optimus L3, L5, L7 Q&A, Help & Troubleshooting

Hi All,
I've had an L7 for a while now. Since about 2 months I started experiencing connection problems with data connection. The phone very frequently drops HSPA to Edge then 3G to nothing then goes back to HSPA again. It is a bit irritating but I lived with it until now. Now I would like to try the new CM Rom as the stock ROM is embarassingly slow. To this I will need to root the phone which would mean loosing the warranty on the phone. I was wondering if I should first bring it to a repair station and have it checked before I root it or should it be a sofware issue which would be corrected with the new ROM? What do you think?
Thanks in advance for the help!

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Bought a used G1 off ebay...3G is broken?

I have a very strange issue with a G1 I just bought off ebay. Everytime it gets 3G connectivity...it attempts to send data ( I see the send arrow flash a couple times) and I'll have full signal, and then it'll just drop to no connection at all. This happened when I first got it (unrooted, stock 1.6 firmware) and is still happening now that I loaded 2.1 on it with the updated radio (2.22.23.02).
The only way the phone is really useable is if I tell it to only use the edge connection...which sucks! Especially because I wanted to use it for internet tethering...
What can I do??

[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

SG II 2.3.4 losing data connection

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

lg l7 often lost mobile reception

Hi experts,
im using lg l7..... 4.2.1 my problem is its often lost the network and will come back later.....
can any one help me to fix this plz
Had this problem with stock rom and the only think that I found fixing it was turning on mobile data for a sec and signal reception was back

[Q] Note4 loosing data connection

Dear Friends,
has some who owned note 4 faced a continuous loosing data connection?
I have been facing this issue for the passed one week till now, I have tried to format the device but the problem is still there, I have not done anything to the device.
I called my ISP and they said that there is no problem with your sim card.
please advise if anyone of you had similar issue.
thanks
silverado said:
Dear Friends,
has some who owned note 4 faced a continuous loosing data connection?
I have been facing this issue for the passed one week till now, I have tried to format the device but the problem is still there, I have not done anything to the device.
I called my ISP and they said that there is no problem with your sim card.
please advise if anyone of you had similar issue.
thanks
Click to expand...
Click to collapse
I've just experienced this today on my 1 day old N910C, I'm on 4G and suddenly earlier today my 4G mobile data indicator disappeared but it still showing the usual signal bars. Tested browsing, no mobile data it said. Tried putting it to Airplane mode then back to normal, didn't bring mobile data back. Rebooted it, then it's working again.
Not yet to see this problem but my friend's Note 4 had this problem. In the end he brought it to the service center and they replace the mainboard. Still wait and see if it fixes the problem.
it happened me before on other samsung devices too. generally an update fixes it but could be hardware problem too.
Hopefully its software related ive seen a slew of note 4s have this issue both variants included.. its annoying to say the least
Hi, I just got my phone, may i know whether you guys have resolved the issues?? i need to turn the flight mode on and off a few times to get the data connection back online
I sent back to Samsung services center, it seems that they said they reprogram the software. Will observe and see how it goes.
Mines all good now few updates and new provider all good ?
Hi guys, I've experienced the same issue, the mobile data connection suddenly drops (H+ icon doesn't disappear but the download arrow is off, meaning that there's no inbound traffic) and the only way to have the connection back is to to disable mobile data and than reactivate it. I've updated my phone, I even tried to install firmwares of other countries (different csc) and to change carrier but I haven't solved the problem (same situation on my friend's N4).
Hi
i had a problem with wifi. weak or no connection.
100% solution for my note:
go to settings=>location=>use GPS ONLY.
perhaps it solves also your problem...
Hello all! Just faced the same problem! Losing internet connection. Did anyone find a solution?
Note 4
Yes this is BS. If I go to a place with no data service, then travel back to a place with data service, I have to first disable then re-enable the "Mobile Data" toggle in the settings. It's such BS that this is happening. My note 3 NEVER has this problem. Starting to dislike Samsung's buggy releases.
Same issues..
silverado said:
Dear Friends,
has some who owned note 4 faced a continuous loosing data connection?
I have been facing this issue for the passed one week till now, I have tried to format the device but the problem is still there, I have not done anything to the device.
I called my ISP and they said that there is no problem with your sim card.
please advise if anyone of you had similar issue.
thanks
Click to expand...
Click to collapse
----- got same problem here.. keep drop the signal.. until fedup already.. can someone solve this thing? Need answer.. T_T
Any news on topic? I'm facing with internet on mobile connection, even if bars are full and LTE sign is visible.
I've also noticed some lack of signal during usage, even if I'm constantly in city.

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