3310, 3210, 6100, 6610, 8310, and early Symbian smartphones like the 3650 or 7650.
The user selected the exact phone model from a dropdown menu in the PC application. nokiafree unlock codes calculator v.3.20.03.exe
It's important to understand that this software wasn't "hacking" a phone in real-time; it was exploiting a mathematical weakness in older phones' security. 3310, 3210, 6100, 6610, 8310, and early Symbian