Hello again Milica.

It is not a problem that your phone cannot call out to contact your "buddy" phone but it is likely to be a problem if it cannot receive an SMS from your "buddy" phone.

Normally when you press and hold the on/off button you get presented with a list of options which will hopefully include the option to come out of "airplane mode".  Try that.

Whether or not you can get it out of airplane mode I still think it is worth getting one of your pre-registered buddies to send you the SMS message - unlock.  This is provided that Norton have not translated that as well.  You should be able to find some help text associated with the "unlock Help" screen that will either confirm that the message should be "unlock" or give you the Italian alternative.

Good luck and keep us informed.