Verykool R16 - Manual (Page 17)

Phone security: this function is to lock and prevent other people
from using the phone without permission (default password is
0000). You can change the phone lock password through the
system prompts.
Auto keypad lock: activated this function, when the phone without
any operation in standby screen, the keypad will be locked
automatically after the set time. If you need to unlock the keypad,
you can press any key except end key, and then operate according
to relevant screen prompts.
Calls & SMS firewall: enter calls & SMS firewall, you can press
left/right navigation key to switch between blacklist and whitelist.
Activate Options, you can add new entity to the list or set the
parameter of the block settings.
Connectivity
Bluetooth: enter Bluetooth screen, when power on the Bluetooth,
in My device you can select Search new device to search and
compare with other Bluetooth device. You can select Search audio
device to search the hands-free device. If the Visibility state is off,
the others will not find the phone via Bluetooth.
Note:
The received file that transmitted by Bluetooth are stored in
Received folder automatically.
Data account: with valid SIM card with GPRS function inserted,
there will show the available
accounts of GSM data and GPRS. Data
account can be edited or delete.
Restore factory settings
You can carry on corresponding operation after inputting the correct
password (default password is 0000).
After running the Restore factory settings, the environment setup
(e.g. user profile) restore to factory default setting.
After running the Restore settings and data, the phone clear up the