Phone unlocking

    Dear Sirs

    My name is Lawrence Njeru Nginyirua and my T- mobile phone number is: 6305975964. I live in Kenya, East Africa. I travel to the USA often and use a phone often. I bought a phone from a T-Mobile shop in Chicago and I was told it would be unlocked after about 40 days of use. I did use it in USA and then I came back home. When I use the device unlock App on the phone, I am told the device is not eligible for unlocking. How do I go about unlocking the phone?

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