Sim Card Protection; Finding The Identification Number Of Your Device - Sony xperia X F5121 User Manual

To set up trusted voice
1
From your Home screen, tap
2
Find and tap Settings > Lock screen & security > Smart Lock > Trusted voice.

SIM card protection

You can lock and unlock each SIM card that you use in your device with a PIN
(Personal Identification Number). When a SIM card is locked, the subscription linked
to the card is protected against misuse, meaning that you have to enter a PIN every
time you start your device.
If you enter the PIN incorrectly too many times, your SIM card will get blocked. You
then need to enter your PUK (Personal Unblocking Key) and a new PIN. Your PIN and
PUK are supplied by your network operator.
To set up or remove a SIM card lock
1
From the Home screen, tap
2 Find and tap Settings > Lock screen & security > Set up SIM card lock.
3
Tap the Lock SIM card slider to enable or disable the SIM card lock.
4
Enter the SIM card PIN and tap OK. The SIM card lock is now active and you
will be prompted to enter the PIN every time you restart the device.
To change the SIM card PIN
1 From the Home screen, tap
2
Find and tap Settings > Lock screen & security > Set up SIM card lock.
3
Tap Change SIM PIN.
4 Enter the old SIM card PIN and tap OK.
5 Enter the new SIM card PIN and tap OK.
6
Re-type the new SIM card PIN and tap OK.
To unlock a blocked SIM card using the PUK code
1
Enter the PUK code and tap
2
Enter a new PIN code and tap
3
Re-enter the new PIN code and tap
If you enter an incorrect PUK code too many times, you need to contact your network operator
to get a new SIM card.

Finding the identification number of your device

Your device has a unique identification number. This number is referred to as the IMEI
(International Mobile Equipment Identity). You should keep a copy of this number.
You may require it, for example, when you access the Xperia™ Care support service
to register your device. Also, if your device is stolen, some network providers can use
this number to stop the device from accessing the network in your country or region.
To view your IMEI number on the label tray
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