Samsung B2100 - Manual (Page 56)

a
troubleshooting
If you are having trouble with your mobile phone, try these troubleshooting procedures before contacting a service
professional.
While using your phone, the following messages
may appear:
Message Try this to solve the problem:
Please
insert SIM
card
Ensure that the SIM card is installed
correctly.
Phone lock
When the phone lock feature is
enabled, you must enter the password
you set for the phone.
Enter PIN
When using the phone for the first time
or when the PIN requirement is
enabled, you must enter the PIN
supplied with the SIM card. You can
disable this feature by using the
PIN
lock menu.
Enter PUK
Your SIM card is blocked, usually as a
result of entering your PIN incorrectly
several times. You must enter the PUK
supplied by your service provider.
Message Try this to solve the problem: