I needed to unlock an iPhone 3GS I had purchased from the US via eBay from the Caribbean. I searched through the net did the usual contacting cell unlock companies. One in particular was ATTI Unlock, I got no response from them. Them came across Cellunlocker, filled in the application, which was IMEI and network cell was locked to. This was so easy, it took a little longer than the 5 days indicated. There was only one hiccup in the communication department and that is I had to contact them a couple of times myself asking for a report on the delay, but they replied back to me promptly. Apart from that, I felt the service was good and I got my iPhone unlocked. Well done Cellunlocker, Thank you