Learn what the different codes on your phone are for.
SIM PIN code
This protects your SIM card against
unauthorized use or is required to access
You can set your phone to ask for the SIM
PIN code when you turn it on.
If you forget the code or it isn't supplied with
your card, contact your network service
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If you type in the code incorrectly 3 times in
a row, you need to unblock the code with the
This is required to unblock a SIM PIN code.
If the code is not supplied with your SIM card,
contact your network service provider.
Security code (sign-in PIN, lock screen PIN)
(min. 4 digits)
This helps you protect your phone against
unauthorized use and verify your identity.
You can set your phone to ask for a PIN when
you, for example, unlock your phone, change
security settings, or buy an app in Store. You
can define this PIN yourself.
Keep the PIN secret and in a safe place,
separate from your phone.
If you forget the sign-in PIN and cannot
recover or reset it in any way, your phone will
require service. Additional charges may
apply, and all the personal data on your
phone may be deleted.
For more information, contact the nearest
care point for your phone, or your phone
This is used to identify phones in the
network. You may also need to give the
number to your care point services or phone
To view your IMEI number, dial *#06#.