Unlocked Cell Phones Compatible With Virgin Mobile. Therefore, a device operating on the operator network may not be technically compatible with another operator network. Unlocking a device applies only to deactivation of software that would prevent a consumer from activating a device on the network of an operator in the network of another operator, even though this network is technologically compatible. The process is relatively simple, although it may sometimes be frustrating to handle a bureaucratic system if you just want to change a setting on a device you own. Over time upgrades will be harder to get, they will slow down the performance of the phone, have more security holes, and stop some of my favorite apps running lassen.Auf based on our current Verizon plan, my wife and I can save 50 percent or more of my ground Surrounded (both support WiFi calls, even on the old phone) When investigating the question I have talked to two different sales representatives from Verizon, who gave me incorrect information about activating the iPhone 4S on T-Mobile or Sprint.