How can I connect to a telephone?

To connect to a telephone, follow the steps below:
1) Make sure the device supports the telephone function.
2) Insert a valid SIM card into device and power on device (Make sure that your SIM card supports VoLTE or VoIP service.).
3) Connect the telephone with device ‘TEL’ port via telephone line.

Note: This Q&A question only applies to devices support the telephone function.

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