I have used DCT4 Calculator 2.7, tried 3 times Nokia 6102b Cingular USA IMEI: 358804/00/932793/6 I've no idea about Griffin or Asic or how to determine which applies to my phone. I tried without sim inserted and no luck. Others claim to have used a sim from a different network to achieve unlock on 6101 model. I hope someone can guide me the rest of the way, as I only have 2 chances left before the hard lock. Thank you in advance.