You should first try calling your phone carrier and ask for an unlock code for your Nokia N73. Note: This will not work with all phone carriers, in which case you may have to pay for an unlock code. Otherwise they will ask for your Nokia N73′s IMEI number. You can retrieve your phone’s IMEI number by typing in *#06#.
Once you have your Nokia N73 unlock code, you can start unlocking your phone. Here are the steps:
How To Unlock Nokia N73
1. Type #PW+
2. Enter your unlock code
3. Now type +1#
4. Your Nokia N73 phone should say “SIM Restriction Off”
Now you should have yourself a fully unlocked Nokia N73 phone. You can use it on any phone network you wish! You can find more information and the original steps from these phone guides: How To Unlock A Nokia Phone and Instructions to unlock Nokia N73.
Furthermore, if you are interested in watching a video to see how to unlock the Nokia N73 in a different way, check out this Free Nokia N73 Unlock Video.