Appendix; Common Problems; Display Information - TUBI T7 Manual Del Usuario

If there are not setting when connected with USB data cable, the phone will
enter the state of charge.

5.2 Appendix

5.2.1 Common problems

The phone can't be powered on.
When the battery voltage is too low, it may cause the phone can't be
powered on. Please charge the battery.
Some callings are limited.
Please confirm whether you have call limit, if you set the call limit, you
can't call or only can call the specific number.
My phone was answered by other persons.
Please confirm whether you set the call forwarding, if you have set it,
the call will be transferred to a specific setting.

5.2.2 Display information

During the operation, the following error information may be displayed:
Please insert the SIM card
Please confirm whether you have inserted SIM card. If your card has
been inserted but can not be used, please try to use a dry cloth to wipe the
gold part of SIM card, then insert SIM card again, if it still can't be used,
please contact your system supplier.
No network
If you locate in the area that has no network coverage, or there is a
physical obstruction between the transmitter and you, such as the hermetic
space, the standby screen will show no network, you can't dial or answer
the phone. You can try to close the window where there is network
coverage.
Emergency calls only
When you locate out of the coverage range of your service network but
can receive another network signal, you can only dial the emergency call
and can't call normally.
Invalid SIM card
When your SIM card is locked or the SIM card is in error, please insert
correct SIM card or contact your system supplier.
Input PUK code
When your SIM card is locked because of three times of error PIN code
input, the phone will ask you to input PUK code for unlocking. You should
contact your system supplier to obtain the 8 digit PUK code.
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