Nokia 9 - Manual (Page 103)

Establish a packet data (3G or GPRS) connection only when needed
Select and
Mobile network > Data roaming and activate Always ask .
Tips
Access codes
PIN code
(4-8 digits)
This protects your SIM card against unauthorised use or is
required to access some features.
You can set your phone to ask for the PIN code when you switch
it on.
If not supplied with your SIM card or you forget the code,
contact your service provider.
If you type in the code incorrectly three times in a row, you
need to unblock the code with the PUK code.
PUK code
(8 digits)
This is required to unblock a PIN code.
If not supplied with your SIM card, contact your service
provider.
IMEI number
(15 digits)
This is used to identify valid phones in the network. The
number can also be used to block, for example, stolen
phones.You may also need to give the number to Nokia Care
services.
To view your IMEI number, dial *#06#.
Lock code (security
code)
(min. 5 digits or
characters)
This helps you protect your phone against unauthorised use.
You can set your phone to ask for the lock code that you
define.
Keep the code secret and in a safe place, separate from your
phone.
If you forget the security code, and cannot recover it, your
personal data is deleted before you can use the phone again.
If you've set the number of times you can type in the wrong
security code, your phone deletes your data and resets itself
back to original settings after the last try. If you haven't limited
Tips 103