Dual standby

Dual standby– It means the phone comes with two sim support system. Both will be active in same time but if user uses one of the SIM for call, then the other SIM will be inactive during this time.

  Let explain, one SIM A and another is B if user call using SIM A than the SIM B will not in work and if at that time someone call on B SIM then it will show not reachable

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