Hi, I just got a new 3650 off of ebay, and unlocked it. I put my cingular sim card in it, and it boots up, but gets no service. I go into tools/setting/system/system select and try configuring it manualy. It found the cingular extend network, but when I try to go to it, "No Access" pops up. I went to cingular and had them put my IMEI on there netwrok for my phone. it still doesn't work. I then got bored, put my friends T-mobile sim card in my phone, and it worked!? I put my other friends Cingular sim car in and it didn't work. Any suggestions wuold be much appriciated.