Slider T20 - Phonebook Settings; Speed Dial Setup; Extra Numbers Management; Phonebook Memory Status

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4.2 phone book settings
4.2.1 Speed dial
4.2.2 Extra numbers
By setting this function, the phone will only can dial the
numbers that set in the FDN list.
Notice: this function will need SIM card pin code, it is
easy to lock the SIM,be caution to use!
4.2.3 Memory status
You can view how many phone numbers that saved
4.2.4 Copy contacts
You can copy phone numbers from SIM to phone, or from
phone to SIM
4.2.5 Move contacts
You can move phone numbers from SIM to phone, or from
phone to SIM
4.2.6 Delete all contacts
You can delete all phone numbers from SIM or from phone