Hi, I got this reply from Samsung :-
Thank you for becoming a patron of Samsung product.
Agents Comment :
As per the mentioned query of Samsung mobile model GT-I9100G(Galaxy S II), let us inform you that it’s have no specification difference. There is only change i.e. chipset. Gt-i9100 G has texus chipset with same clock speed, so we request to you don’t believe in any unofficial web site and blog.
And as we are from Samsung technical support team, we have official confirmation that the model GT-I9100 has already discontinued
Regds, Pradeep Kolkata
لو احد خد باله من الرد ده يوضح انه مفيش فرق كبير بين 9100 و 9100g غير ال texus chipset
العبارة الاخيرة ان 9100 قد توقف انتاجه discontinued