You will never miss a call anywhere in a house. It supports Dual SIM Cards, Micro SIM 2 (SIM 1 for 4G, SIM 2 for 2G), Only 1 SIM can have 4G when insert 2 SIM cards. M6 is equipped with 2.4" screan with big green call button, well-arranged 21keys keypad, make a call like it supposed to be.
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