I have been forced to open this thread because of a curious and, as It seems by the searches I made, quite rare problem affecting the network capability of my GT-i9100.
Basically, the phone won't make calls nor send sms (saying that It is "not registered on network"), but at the same time It will be perfectly capable of connecting to the internet (browsing the web, navigating the Playstore, using Whatsapp, ecc..) through 3G network.
Looking in Settings>About device>Status, It shows to be regularly connected to my mobile carrier, even though "Service state" is "Out of service".
Even if I try to manually select the network operator from Settings>Mobile Networks It says "Unable to connect".
I've first tried to verify the carrier network functioning by moving the sim card to another phone (which works perfectly) then, thinking It was fault of the Cyanogenmod I was running (cm-10.1-20130728-NIGHTLY-i9100), I've brought the phone back to complete stock (PDA: I9100XWLSW,
CSC: I9100ITVLS2, MODEM: I9100XXMS3) and made a full wipe, without any positive results.
At this stage I have to say I'm getting a bit put out and, having to fly abroad in two days, desperate for solutions. Any idea?
Thanks a lot in advance.