Tannoy T303C - Manual (Page 7)

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7
SIM and PIN
SIM card
The SIM (Subscriber Identity Module) card, which you get from
your network operator, contains information about your subscription.
Always turn off your phone and detach the charger and remove
the battery before you insert or remove the SIM card.
PIN code
You may need a PIN (Personal Identification Number) to activate the
services in your phone. Your PIN is supplied by your network operator.
Each PIN digit appears as *, unless it starts with emergency number digits,
for example, 112 or 911. You can call an emergency number without
entering a PIN.
You can save contacts on the SIM card before removing it from
your phone. Contacts may also be saved in the phone memory.
See Contacts on page 18.
If you enter the wrong PIN three times in a row, PIN blocked.
To unblock, enter your PUK code provided by your network
operator.
appears. To unblock it, you need to enter your PUK
(Personal Unblocking Key).