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ZTE Tianji 9pro cannot recognize the mobile phone card and cannot open wifi after factory reset

1. Make sure the SIM card is correctly inserted into the SIM card slot of the phone. If inserted incorrectly or if foreign matter is present, carefully reinsert or clean the slot.

2. Try restarting the phone, which can solve temporary software problems.

3. Make sure the phone is in the correct network mode, and the mobile data and WiFi functions are turned on. This can be adjusted in the Network Settings section of the Settings menu.

4. Check whether there is an available system update. If so, please ensure that the phone has been updated to the latest software version, which will help fix existing problems.