Introduction:
1. Dual card: It refers to devices that can support two SIM cards at the same time, such as those of two cities or two operators.
2. Double standby: two numbers can be on standby on one mobile phone at the same time.
3. Dual pass: Dual-pass in the true sense means that two numbers can be dialed at the same time on one mobile phone and can talk and surf the Internet at the same time (even if the main card is on a call, the main card can still surf the Internet normally without using the secondary card data).
What is DSDA?
DSDA or Dual SIM Dual Active is a feature in which both SIM cards can receive calls or texts, but only one can be used for active data or calls at a time. Both SIM cards can be active simultaneously, meaning you can receive calls or texts on one while using data or making a call on the other.
The functions that DSDA dual-SIM, dual-standby, dual-pass technology can achieve include:
A. One card for Internet access and one card for calls without interruption. When the secondary card is supported for calls, the main card's Internet access will not be interrupted (single-pass models need to turn on the "always have access to the Internet during calls" function and occupy the secondary card's traffic to maintain the data network).
B. One card for games and one card for incoming calls without interruption. When using the main card data network to play games, when the secondary card receives a call, the game will not be disconnected from the network.
C. One card for calls, one card for incoming calls, no missed calls. After answering the call from the main card, you can receive the call reminder from the secondary card (please note that only one card call and one card reminder are possible, and simultaneous calls are not possible).