Hi guys, I'm trading my Blackberry Bold 9900 for an iPhone 4s and want to know if there is anyway to check the phone is not IMEI blocked. He says the phone is an ATT version; does ATT even block IMEI? I do not have an ATT sim card to check as I am hoping to use it on Red Pocket in the coming weeks. Also, we are meeting in the Apple store as I was hoping someone can help me verify that the phone is not blocked. Thanks.