I am enjoying the iphone immensely. The only suggestion I have would be to make it compatible with Verizon so the people who already have the phone through AT&T can make a choice as to whether they want to stay with their current network or move to Verizon without having to repurchase the phone. There aren't many changes I would make.  I would make a case that is transparent but does not have the face cover of the current one.  Make it similar to current style of the ifrogz.  Other than that I have no other suggestions at this time.