Verykool R16 - Manual (Page 7)

1 Start Using
Battery
Battery is attached with the phone. Please recharge it for use after
completely using up the battery for the first three times, which
makes this battery easier to achieve the best using state.
In actual use, the standby time and talk time of the phone varies
with the network status, working environment and different using
manners.
For install the battery, you should put the back of the phone
upward, push the rear cover ahead, and then take off the rear
cover. Then insert the battery in place.
SIM card
The SIM card is the key for accessing to the digital GSM network.
Prior to using the phone, you need to insert effective SIM card
in the phone.
In order to prevent illegal use, SIM card adopts PIN code (personal
identification code) encryption protection.
If this function is selected, PIN code should be input correctly each
time when you power on the phone, thus to unlock the SIM card for
normal use. Users can disarm the SIM card protection but illegal
use of the SIM card cannot be prevented.
If the PIN code input is error for three consecutive times, your SIM
card will be locked by the network. There will enquire the PUK code
which provided by your network operator. If the PUK code input is
wrong for 10 times, the SIM card will be permanently barred.
Note:
Your network operator will set a standard PIN code and you
should change it to private password.
Plug in the memory card
Open the memory card holder, and insert the memory card into the
slot at the bottom, then close the memory card holder.