New answers tagged data-connection
Usually, mobile data should be turned off automatically by the system when WiFi is connected. If you're sure it's mobile data which is on, you could try some automation tools to handle this, e.g. Tasker (Condition: WiFi connected, Task: mobile data off), or Llama - Location Profiles (here I don't know the steps, but it can do that as well).
I have had a similar problem to this. In my case, it was caused by the SIM card coming loose. Try the following steps:- Turn the phone off completely Remove the SIM card Reinsert the SIM card Turn the phone on again and then see if you can make a call and use mobile Internet. If it happens repeatedly, you might need to wedge a small piece of paper in ...
With Android 4.x you can Disable carrier installed applications by going to the Settings -> Applications and select the app. You should then see "Disable" for the application. Now, Samsung has found a way to prevent some applications to not be disabled, like their Launcher, Email client, stock browser. You can also go to Settings -> Data usage and select ...
I don't think it logs location but I think it does most of everything else you're looking for: Network Log I use it every now and then to monitor net traffic and it works really well.
I had the same problem after installing custom rom (ICS for Desire), solved it by installing Data Connection Fix from Google Play. It now works perfectly.
Edit the APN entry (see mel's answer) and delete the SUPL and MMS fields. Select default for the type and then your data will work.
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