User's Manual

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can carry out simple math calculation.
Write by stylus to enter the numbers. Use following direction keys
to calculate：
Up, down, left, right key: ＋、－、×、/
OK key: Show the calculation result.
* Key: Decimal point
4.7.5 STK
Enter STK submenu, you can use the additional services that the
network service operator provided.
The device has STK function. The service is provided by network
operator. If SIM card or network operator fails to provide the
service, the function can not be available. Contact network service
operator, if you want to have more information.
4.8 Profiles
You can choose the profile you need.