SMT-W6100 User Guide30PINThis is usable when SIM card is inserted in Wi-Fi phone.The PIN(Personal Identification Number) protects your SIM card against unauthorized use. Whenthe PIN Check feature is enabled, you must enter the PIN each time you switch on the phone.See ‘Security(Menu 6.6)’ section of this guide.If you key in an incorrect PIN three times in succession, key in the PUK and press the OK softkey to unlock the phone. Key in a new PIN and press the OK soft key. Key in the new PIN againand press the OK soft key.PUKThis is usable when SIM card is inserted in Wi-Fi phone.The PUK(PIN Unblocking Key) is required to change a blocked PIN. The PUK may be suppliedwith the SIM card. If not, contact your local service provider.If you key in an incorrect PUK ten times in succession, the SIM card cannot be used anymore.Contact your service provider for a new card.You cannot change the PUK. If you lose the code, contact your service provider.