Verykool R23 - Manual (Page 40)

The mobile phone cannot search for the network
n
The mobile phone is outside of the network coverage area (or
there are physical obstructions between the mobile phone
and the transmitter), and calls cannot be made or answered.
If you are in one room, please move close to the window.
In the operation process, the mobile phone may display the
following operating tips:
“Please Insert SIM”
n
You must insert the SIM card before using the mobile phone. If
the SIM card has been inserted, please get it out and wipe
clean with a dry cloth on the golden region, and then insert
the SIM card.
“Emergency”
n
You are outside the network coverage area of the service
provider. But another network area where you locate allows
you to make emergency call according to the signal strength.
“Invalid SIM”
n
The SIM card of the mobile phone is locked and the inserted
SIM card is unable to be accepted. Please insert the correct
SIM card or contact with the vendor.
“Please Enter PUK”
n
The SIM card has been locked since the wrong PIN code has been
inputted for three times. You must consult your network provider
for special PUK code with eight numbers to unlock the SIM card
(The PUK code may have been provided with your PIN code at
the same time).
Warning:
The SIM card will be permanently locked if you input the wrong
PUK code for ten consecutive times and you must apply for a
new SIM card from your network provider.
15 Maintenance Guideline
Welcome to use R23. If there is a problem when you using the
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