What if the telecom card is silent?

first, click on the home page of the mobile phone to open the "information" application.

in message, select to send "prl" to 1659165.

after sending the short message, the mobile phone will receive 6 short messages later, and the last one will display the words "PRL update completed".

then return to the main page of the phone, press and hold the power button of the phone, and then click "Restart the phone" in the pop-up page.

Finally, wait for the phone to be turned on. After the phone is turned on, the mobile phone card can be used normally.