checkmend website . yeah ive been to the three store & they have gave me a new micro sim card the sim is active as ive put it in my orther iphone and has singnal but when i put it it my iphone4 no service :S
What website? There is no definitive list of blacklisted devices available on the web. Did you give your carrier the IMEI # of the phone and ask them why you are gettinga message saying your phone is not allowed?