SERVICE DETAILS:

All Cricket iPhone Models, Must be activated at least 6 months on Cricket Network in order to get unlocked.

Country: USA
Manufacturer: Apple
Network: Cricket
Not Supported:  Blacklisted  / Recently purchased devices or not activated for at least 6 months.
Supported: Clean & activated for 6+ months

Next Tether Policy Details:
US Cricket Communications LTE Policy
US Cricket Communications Locked Activation Policy 
US Cricket Communications Service Policy
US AT&T/Cricket Locked Policy