Xperia S keeps erasing APN setting on regular base

[BarbarosxPeriaS]

Hey, I have another problem this time, on a regular base (like every couple weeks) my phone erases APN setting by itself. So, whenever I figure out that I have no data connection (some apps and email stops responding and start to give "check data connection" or "no data connection available" warning) I started to look at APN setting of my carrier and find the settings changed to "none" values (which you can get when you want to add a new APN setting manually)...

I do not know why or what causes this, but depending on the information from my carrier's support (vodafone), I have not used wireless connection so it is not the wireless...

I have clean installed the ICS to see if problem occures again, yes it occures regularly... Nothing changed...

Is there any idea how to fix this?

[Johan]

I really don't have any explanation to why this happens to you. I suggest that you check if changing the SIM card or reinstalling the software via SUS could help.

http://www.sonymobile.com/gb/tools/update-service/

[Apalsola]

The same is happening to my Sony Xperia S (LT26i). All APN settings are erased and I am not even able to set them manually! (To be exact, I am able to enter the settings but the APN list keeps empty after I tap "Save".) Automatic Internate settings download (Settings -> Xperia -> Internet settings) doesn't work either.

I was able to fix this once by changing the SIM card but the APN setting got erased again in few days and now changing the SIM card doesn't help anymore. So, I don't have mobile internet for now...

Bulld number: 6.2.B.0.200

Android version: 4.1.2

Message was edited by: Apalsola