Sony ST21a2, ST21i2, 12640775 Locking and protecting your phone, IMEI number, SIM card protection

Models: 12640775

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Locking and protecting your phone

Locking and protecting your phone

IMEI number

Every phone has a unique IMEI (International Mobile Equipment Identity) number. You should keep a copy of this number. If your phone is stolen, your network provider can use your IMEI number to stop the phone from accessing the network in your country.

To view your IMEI number

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1Turn off your phone, then remove the battery cover and battery.

2Look for the 15 to 17-digit number on the label. The first 15 digits represent the IMEI number.

SIM card protection

The SIM card lock only protects your subscription. Your phone will still work with two new SIM cards. If one of the SIM card lock is on, you have to enter a PIN (Personal Identity Number). If you enter your PIN incorrectly more times than the maximum number of attempts allowed, your SIM card will become blocked. You need to enter your PUK (Personal Unblocking Key) and then a new PIN. Your PIN, PIN2, and PUK are supplied by your service provider.

To enable the SIM card PIN lock

1From the Home screen, tap . .

2Find and tap Settings > Security > Set up SIM card lock.

3Select SIM1 or SIM2.

4Tap Lock SIM card.

5Enter the SIM card PIN and tap OK.

To change the SIM card PIN

1From the Home screen, tap . .

2Find and tap Settings > Security > Set up SIM card lock.

3Select SIM1 or SIM2.

4Tap Change SIM PIN.

5Enter the old SIM card PIN and tap OK.

6Enter the new SIM card PIN and tap OK.

7Retype the new SIM card PIN and tap OK.

To change the SIM card PIN2

1 From the Home screen, tap .

2Find and tap Settings > Call settings

3Tap Select SIM card, then tap SIM1 or SIM2.

4Tap Fixed dialing numbers > Change PIN2.

5Enter the old SIM card PIN2 and tap OK.

6Enter the new SIM card PIN2 and tap OK.

7Confirm the new PIN2 and tap OK.

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Page 104
Image 104
Sony ST21a2, ST21i2, 12640775 manual Locking and protecting your phone, SIM card protection, To view your IMEI number