Verykool i128 - Manual (Page 19)

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 Show Date and Time
Select On or Off.
― Auto Update Time
Select Off, First confirm, or On.
― Flight Mode
Select Normal mode or Flight mode
― Misc. Settings
Select LCD backlight to set
4.8.3 Network Settings
― SIM1/SIM2
 Network Selection
This function can let you select the network manually or
automatically.
4.8.4 Security Settings
― SIM 1/SIM 2 Security
 PIN Lock
PIN number setting can avoid unauthorized usage of SIM
card. If PIN number has been wrongly inputted for 3 times,
the SIM card will be locked. PUK number is needed to
unlock the SIM card. Please contact the network provider if
you don’t know the PUK number.
 Change PIN
Input old SIM1/2 PIN, and then input new PIN, input the
PIN code again to confirm. Before change PIN, you need to
turn on PIN lock.
 Change PIN2
Input old SIM1/2 PIN2, and then input new PIN2, input the
PIN code again to confirm.