* From T-Mobile's website:
Unlock requirements
We provide mobile device unlock codes free within two business days (or provide further information about timing) for eligible devices.
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Device eligibility is determined as follows:
The device must be a T-Mobile device.
The device must not be reported to T-Mobile as lost, stolen, or blocked.
The account associated with the device must not be canceled, and be in good standing.
You have requested no more than two mobile device unlock codes per line of service in the last 12 months.
The device must satisfy all the Postpaid or Pay in Advance (Prepaid) Unlocking terms outlined below.
T-Mobile may request proof of purchase or additional information in its discretion and certain other exceptions may apply.
Unlock eligibility for monthly phones, tablets, and mobile Internet devices
The device must have been active on the T-Mobile network for at least 40 days on the requesting line.
If the device is financed using T-Mobile?s Equipment Installment Plan (EIP) ,or if it's leased through JUMP! On Demand?, all payments must be satisfied and the device must be paid in full.
If the device is on an account that is under a service contract term, at least 18 consecutive monthly payments must have been made or the account must have migrated to Simple Choice no contract rate plan.
If the device is associated with a canceled account, the account balance must be zero, including all pending charges.
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Unlock eligibility for Pay in Advance (Prepaid) phones, tablets, and mobile Internet devices
The device on the requesting line has been active for more than one year on the T-Mobile network.
If the device has been active for less than one year on the requesting line, the Pay in Advance account associated with the device must have had more than $25 in refills for basic phones or $100 in refills for phones or tablets since device first use date. $100 in total refills is required for each device that is requested to be unlocked.