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Phones switches to 2g during call - (3G) data is disabled

Hi everyone, I'm running Android 2.3.4 (OpenSoju Rom) on my Nexus S,
but the issue i'm going to describe has happened to me on other Roms and
even on my old Nexus One.
When the phone is idle, 3G data works great (also when using apps that
require an internet connection), but when I receive a call,
after a minute or two, the 3G icon disappears from the notification
bar and the phone data connectivity is lost - no connection to the internet.
I've asked around and someone told me it is because the phone switches to
2G network during the call and when in the phone is in 2G mode, during a call
there is no data (on a 2G network).
I know that in the past this behavior did not occur, and in my country
when in 3G during a call - data is enabled!
So does anyone know how to fix/change the setting that causes this behavior?
'cause, for me, sometimes I really need the data connection during a call,
for example, when navigating using Waze (which needs data connectivity),
and receiving a call it causes Waze to stop working and I lose my GPS direction.
Thanks.

Use to work for me too. Then i noticed when AT&T started saying the had talk and web at same time, mysteriously it started doing what is happening to you. And i have Sprint, unless you switch to at&t you might be waiting for awhile.
guys234 said:
Hi everyone, I'm running Android 2.3.4 (OpenSoju Rom) on my Nexus S,
but the issue i'm going to describe has happened to me on other Roms and
even on my old Nexus One.
When the phone is idle, 3G data works great (also when using apps that
require an internet connection), but when I receive a call,
after a minute or two, the 3G icon disappears from the notification
bar and the phone data connectivity is lost - no connection to the internet.
I've asked around and someone told me it is because the phone switches to
2G network during the call and when in the phone is in 2G mode, during a call
there is no data (on a 2G network).
I know that in the past this behavior did not occur, and in my country
when in 3G during a call - data is enabled!
So does anyone know how to fix/change the setting that causes this behavior?
'cause, for me, sometimes I really need the data connection during a call,
for example, when navigating using Waze (which needs data connectivity),
and receiving a call it causes Waze to stop working and I lose my GPS direction.
Thanks.
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Sent from my Nexus S 4G using XDA App

Prevent 3G data connection

Hi All,
How do I make it so that my phone will not try and connect to the internet via 3G (the signal icon on the status bar has 3G written on it). Whenever my phone switches to 3G, internet doesnt work. this has been a problem for me here in Aus on multiple phones. While the icon says H, internet works awesome but the second it switches to 3G internet stops working until it switches back to H. It wouldnt be too bad, if it wasnt for the fact that the bloody thing switches back and forth every 5 seconds if Im in a good reception area, which is almost all the time.

Are you rooted/custom ROM? It sounds like it could be a poorly performing radio. Search for the radio/ril thread. You might find some answers there. You can switch your phone to 2G or 3G networks only, but the 3G option also includes H. So even if you left out the 2G you'd still suffer the same issues.

4G doesn't show up at all on Liquid Smooth after turning off wi-fi!

So when the phone boots up, I have 4G connectivity. When I decide to turn on my Wi-Fi, use it for a little bit and then turn it off...I don't have any data. Data is on and I try toggling airplane mode as well. I just have bars for calls and sms. No data for surfing the web and etc.
Has anyone gone through this?
Happens on other ROMs for me as well.

What are your settings under mobile network settings network mode, system select and CDMA subscription?
Sent from my SCH-I535 using xda app-developers app

Sony Xperia Z1s WiFi - 4GLTE switching issue

I love my Z1s, however, there are few annoying issue I'm having.
It seems like it takes a while for my phone to switch between Wifi to 4G LTE (or cell signal, and i'm on T-mobile). or the other way around.
For example, when i'm at home, it will automtaically connect to my home WiFi. When I leave home, the icon will switch to 4G LTE bars (but sometimes "4G LTE" is missing) without problem, however, phone itself will shows no network when I try to browse.
I will eventually swich over to 4G after a while, or restarting my phone.
Same thing happens the other way around. (on 4GLTE then get home switching to Wifi, it takes a while to completely switching over).
Anyone has similar issue?

[Q] Cyanogenmod 11 Mobile Data Connecting

I recently bought a Moto G US GSM Unlocked and a Straight Talk Unlimited plan. I put Cyanogenmod 11 on the phone before installing the sim card, then installed the sim card and set everything up. I had to use the AT&T card for my area.
The problem I'm having is connecting to mobile data (HSDPA and HSDPA Plus). When I turn the phone on it takes several minutes for it to get a data connection. I have full bars (or some bars, depending on where I am) but no H or H+ icon, no internet connection. The same thing happens after turning off WiFi, it takes some time to get the data connection. Then after it does get the connection it cycles between H and H+ randomly.
I have researched the APN settings I should be using, and found a great thread on androidcentral with a bunch of people trying different settings. The settings I am using now let me send and receive texts and mms, and use internet. But it still takes a long time to connect when the phone first starts or I turn off WiFi.
Is this normal? If not, what could be causing this? It's frustrating because I plan on using WiFI almost exclusively while at home and turning if off when I leave. I don't really want to wait several minutes after leaving for the phone to get it's internet connection back.
Thanks