Support Functions: Fingerprint Unlock(Fake fingerprint function). Function: Support fingerprint recognition technology, unlock faster. 4G: This unlock 4G smart phone supports 4G FDD: B1,B3,B5,B7,B8,B20, 2100,1800,850,2600,900,800, TDD: B39,B40,1900,2300, which can be used with almost all SIM card operators in the world.
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