I hope someone can give me a hint on the following issue:
I noticed that i have a huge amount of mobile-data traffic the last few days/weeks and as i have not installed any new app or changed behaviour i investigated and found it was "Google services - background-data" ..
As i have DISABLED ALL Google-Account sync topcis (e.g. fotos, calendar, mail etc ... ALL) i wondered what this was.
After some further investigation i found that others have the same problem (with other custom-roms) and the reason was that obviously some OTA Updates was (partly) downloaded ... when i check the update-section in system-info i see that some "download of 4.0.4 update failed" .. and even if i never got any notification it seems the OTA-Updates is always (partly) downloaded - and the data matches the mobile-data i am "loosing".
So the questions is:
Even if I am on a custom rom (currently MCR IR12 - wanted to wait for IMM76I-MCR) the OTA is downloaded automatically (but then fails) and no notification is shown also.
How do i prevent that ? - before having IMM76I-based ROM. I always thought a custom rom should not download OTA, but obviously it does (and was confirmed by others) ... maybe something new with ICS ?
I thought about modifying build.prop with most recent IMM76I fingerprint ? .. any side-effects if that does not match the ROM-base i have (IR12).
Or anything else i can do to prevent the downloading ? I need to stop this data-usage .. and obviously it is downloading the OTA again and again, but then fails at one point ...
EDIT: Just to add ... I had the "4.0.2 build fingerprint" included in my rom-bake for IR12 .. so that is probably one reason why the OTA is downloaded.
But obviously the download (or probably the verification) fails - thats why it get re-downloaded. I now tried to delete the 4.0.2 build fingerprint from build.prop and added the 4.0.4 - IMM30B from IR12-base one instead. Now I get "system up-to-date" when checking for firmware updates again (instead of the "download failed") - probably because for IMM30B there is not OTA to IMM76I compared to IMM76D ?). Let´s hope this prevents anything from beeing downloaded - and using mobile data when not on WLAN. But anyway I would like to understand why the download happens (again and again) when one is on an old version and how to prevent that with a custom rom (MCR in this case).
EDIT2: discussion about this also ..
and here (in German though ;-): http://www.android-h...erbrauch-3.html
seems that this is quite confirmed (that OTA gets downloaded again and again) when using a custom rom <IMM76I .. question is just WHY and how to stop it !! ;-)
There will always be times between a new OTA available and new Custom-Rom build beeing available .. and i can´t risk to spend all my 300MB 3g-traffic to be spent for this.
Edited by marcuso, 15 May 2012 - 08:20 PM.