Q: Problem with backup

Hi,

What kind of lock is that ? And how do you the backup ?

☞  Backup in iCloud or via iTunes to the computer ?

https://support.apple.com/en-ie/HT204136

Lock because you don't know the passcode?

☞   Use a passcode with your iPhone, iPad, or iPod touch

https://support.apple.com/en-us/HT204060

☞  Manage your account

https://appleid.apple.com

☞  Apple ID support

https://www.apple.com/support/appleid/manage-account/

Or is your Apple ID locked ?

☞   If your Apple ID is locked

https://support.apple.com/en-us/HT204106

☞   If you forgot the answers to your Apple ID security questions

https://support.apple.com/en-us/HT201485

☞  Having trouble siging in?

https://iforgot.apple.com/password/verify/appleid

Lock because you use a different carriers ?

☞   How to unlock your iPhone for use with another carrier

https://support.apple.com/en-us/HT201328