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Dual Standby
Dual SIM phones are of two type. One type, that is the common, can give you the service of only one SIM at a time. Only one SIM will be active at a time. To make calls or send message, you will be given an option to select one from the two SIM cards. This is known as Dual standby. There is one more type, that is, dual SIM active mode. Phones with this feature can support the working of both the SIM cards simultaneously.
Check the meaning of technical terms related to Mobile Phones: