$ When failing to connect to the network, the phone will keep
searching base stations; this consumes much battery and reduces
standby time. Move to an area with stronger signal strength or switch
your phone off temporarily.
$ Replace the battery.
$ Make sure that the contacts on the SIM card are not damaged; use a
clean cloth so you do not scratch it.
$ Make sure the SIM card is inserted correctly.
$ SIM card invalid. Contact your service provider.
$ Make sure that the number you dialed is available and the dial key
has been pressed.
$ Make sure the SIM card is valid.
$ Make sure that the battery is inserted correctly. Securely connect the
charger to the phone.
$ Only charge the battery in an environment where the temperature
does not go below -10℃ or above 55℃.
$ The battery, or charger, needs to be changed.
$ The operation is wrong.
$ The network providers do not support the function, or you cannot
apply the function.
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