As of right now, Verizon still will not activate an Alltel device on the Verizon network. I had heard that Verizon planned to allow non-VZW phones to be activated but nothing ever became of it.
All CDMA carriers follow this rule of not activating a device they did not originally sell. Even if they do sell that same model, if a carrier didn't sell that particular one they won't allow it on their network.
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