I attached my phone to my PC to transfer some photos.The PC already had the Samsung KIES software installed and advised that an upgrade was available.I let it upgrade,but now my phone screen is only showing an icon of a PC attached to the phone with a triangle and exclamation mark in the centre.I have tried to get out of this screen as per instructions in my Samsung GT-15500 manual,holding down the "call ended" button and the up volume button together for 10 seconds.After the 10 seconds the Samsung intro screen appears for one second then reverts to the previous screen.I have tried it on another PC with the same result.I do also get a battery charging icon when it is attached also,but am unable to get into the phone.Also both PC's are not recognising the phone.I have also tried the device connection troubleshooter in KIES without luck.So,is it a driver problem or a phone problem? I've tried another SIM in it also...same thing