The short answer is NO.
If you get a new phone, Verizon will force you to convert to a Verizon plan. If you are still under Alltell contract, and get a used alltell phone to replace a defective one, they will activate that alltell phone under the alltell plan for the remainder of the alltell contract.
If you get a new phone, Verizon will force you to convert to a Verizon plan. If you are still under Alltell contract, and get a used alltell phone to replace a defective one, they will activate that alltell phone under the alltell plan for the remainder of the alltell contract.