I am skipping the whole introduction of my new phone, Samsung Galaxy SII i9100, because I am having some major problems. The device itself works fine, surf the internet with wifi / play video / listen music etc, but as phone itself, I cannot use call and text feature reliability. I only manage to received one text msg and one make call (voice mail). When I was at phone' info, phone number, network, etc. I noticed when I first made that one successful call, it was on Edge. BUT when I tried to send a text msg, it failed. So if someone has an idea what is the problem here, before I contact the seller, please let me know soon. I want to make this work. Thanks all.