This is quite old trick but some of member still asking about how to change your phone operator logo using fexplorer i hope this trick works for you but first i want to make some notes:
1. i have try this trick on NGage but i'll assume almost all symbian 60 phones can do this trick.
2. as long as i've tried this trick it didn't have any side effect on your phone system so it's safe to try.
3. if you have another operator logo pictures you can post the operator logo picture in this topics so other member can use it also.
4. okie, just cut the craps and let's the tutorial begin...
installed the "fexplorer" apps to your phone (it's better using the latest version of "fexplorer" apps), you can download this apps at symbian60 apps forum.
i'll will attach some of operator logo picture in .rar files just extract and
transfer the operator logo pictures to your phone (ie. the root drive of your mmc e:\)
there will be confirmation to reboot your phone to finished the steps, just select yes.. and after the phones rebooted your operator logo will be changed congrats....