Hello everyone, I found Justin guru's contact here. I contacted him via whatsapp to give me the unlock code for my Zte Mf83m modem and he did within a very short time. He charged me 2k for the service, so I transferred money to him and he sent the unlock code to me within 15 minutes. I can say he is real, honest and straight forward for this particular deal I had with him, so I can recommend him to anyone trying to unlock their modems. Thank you. The only thing about him is, I think he is a little too rigid with his price.