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One plus five, one card and two cards, how to prompt the shutdown?

1. Check whether the SIM card is damaged and can be used normally on other mobile phones.

2. Check whether the card slot 2 of the mobile phone supports the current SIM card. If there is no problem with the SIM card, the mobile phone also supports the operator of the SIM card. It is recommended to contact the official after-sales service center, and the engineer will help check and handle it.