Good news, Good news, Good news, Good news. Rebel sim Card once again have released the much awaited firmware release the version v61i. since December last year when the iphone 2.2 was released people who have been experiencing problems will know what i am reffering too. But now the latest version 61i has worked wonders with my T-mobile sim. I did not need to reset the network keys on my network sim and when inserted it took a few attempts to search for network and then it stabilised with signal. I was so stunned and ecstatic to see T-mobile on my Iphone 3G. i just couldn't get over it. Great product and the best thing is that the rebelsimcard does not void the warranty on the iphone. Its just plug and play.