Until those services decide to force you to have a phone number registered, which means that you can't have more than one of those services, unless you're willi

Until those services decide to force you to have a phone number registered, which means that you can't have more than one of those services, unless you're willing to sign up for a new cell contract because they don't accept prepaid cell numbers anymore or VOIP numbers. (yes, this is based on personal experience)