My unlocked iPhone 4s arrived today from Apple but the screen started playing up and now the whole left row of icon thickness of screen won't respond to touch. I rang tech support (who were outstandingly helpful) and they are sending me a replacement. I was so excited and now I have to wait around four days for the new one to arrive. I just wanted to know if anyone else had had this problem. I have tried updating and restoring but without any luck.