U can tether without paying Verizon by rooting ur phone and getting the Wireless Tether app
The 4.5 version is MotoBlur version and not the os version
The os version is 2.3.3 (if ur on Gingerbread)
[ ] Motorola Droid: Miui 1.9.30
[ ] Motorola Droid 2: Miui 1.12.30
[X] Motorola Xoom: Team EOS ICS