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How to use SmsManager to send short messages for dual-card dual-standby mobile phones?

1, dual-card dual-standby mobile phone, without setting, it will show which card is sending and receiving SMS.

2. The dual-card dual-standby mobile phone itself distinguishes between card 1 and card 2. If the SMS is sent and received by 1 card, it will be displayed on the mobile phone that it is sent and received by 1 card; If the short message is received or sent by card 2, it will be displayed on the mobile phone that it is received or sent by card 2.