The ability to "buy minutes" for a phone depends primarily on whether the device is and the type of service it currently uses. While you cannot simply "buy minutes" for a phone that is currently tied to a strict, non-prepaid contract with another carrier, you can add minutes to any phone that supports prepaid service . Core Requirements for Buying Minutes
To successfully add minutes to a phone, the device must meet two specific technical criteria: H2O Wireless can you buy minutes for any phone