I have sgs3 i9300 from sunrise switzerland, on the box, its written: "european sim model" and "this product is only compatible with sim-card issued from a mobile operator within europe"
and its happen, i can use italian operator (3 italia) but when i inserted indonesian sim card (axis) its locked, emergency calls only, and the phone asking for "SIM network unlock PIN" or "enter network lock control key"
because i need to use this phone in indonesia,
i try with:
1. following this method http://forum.xda-developers.com/show....php?t=2176719 ; but after select  network lock, there are no menu again, even i already use 4.1.1 firmware.
2. some code are not working on this phone, for example *2767*3855#, *# 7465625#
3. i try to install indonesian firmware 4.1.1 and 4.1.2 but became lost my IMEI and generic IMEI appear
4. try to install swiss firmware again 4.1.2 mg4, and get back the imei, and also back to the initial conditions.
5. try to buy the unlocked code, but the code still not works
6. try to root and patched use ariza http://forum.xda-developers.com/show....php?t=2218428 but still unsuccessful
AP : I9300XXEMG4
CP : I9300XXEMG4
CSC : I9300AUTEMG2
android version : 4.1.2
baseband version: I9300XXEMG4
kernel version : 3.0.31-1314436 se.infra@sep-108#1
build number: JZO54K.I9300XXEMG4
is it sim locked? or the hardware only compatible for european?
some body, please help me, i'm really frustrated with this phone.....
thanks a lot,