My contract was renewed approximately 2 months ago, and my phone was upgraded to a Blackberry Curve 8520 The phone did not present with any problems until the evening of Thursday the 23rd of June. From that date up until now, I have experienced the following problems with the phone: - Cannot make calls: Says ‘call failed’ on screen when attempt to make calls - Cannot receive calls - Cannot send or receive smses My sim card works in other phones, and other people’s sim cards work in my phone On Saturday the 25th... read full review »