After winning a waiver from the FCC, Verizon has been quick to update its unlock policies, making it harder for customers to leave with their devices for a rival carrier. The changes don't affect just people who use Verizon, but also several MVNOs that piggyback on Verizon's network.
Compared to AT&T and T-Mobile, the policies are largely the same, especially when it comes to prepaid devices. AT&T appears to still respect the 60-day window that was waived for Verizon.
