Good Morning to all....and speaking about SGS 9100G,I found out that when you go to contact,both sim and phone are displayed!This does not happen in SGS 9100(as I happened to also owned one now....having both phones!).SGS2 9100 just display phone contact,I just have no idea how to see the sim contact(wether to know the amount of sim contact,let alone to update...!).So in this aspect SGS2 9100G is better.
Rooting your Samsung Galaxy SII (I9100G), also updating/repairing a bricked one