Technical Specs

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webpage.
SIM Toolkit
STK service is the tool kit of SIM card. This phone supports the service function .The specific items are
depended by SIM card and network. Service menu will be auto added to the phone menu when supported by
network and SIM card.
6 Appendix
Appendix 1：Troubleshooting
If you find exceptions when operating the mobile phone, restore the factory settings and then refer to the
following table to solve the problem. If the problem persists, contact the distributor or service provider.
Fault
Cause
Solution
SIM card error
The SIM card
is damaged.
Contact your network service provider
The SIM card
is not in
position.
Check the SIM card
The metal
face of the
SIM card is
polluted.
Clean the SIM card with a clean cloth