AT&T phone service is used for calling a Magic Jack phone.

Yes, you can use AT&T phone service to make calls to a MagicJack phone. MagicJack is a Voice over Internet Protocol (VoIP) service that allows you to make phone calls using the Internet. As long as you have an active AT&T phone service and a reliable internet connection, you should be able to make calls to a MagicJack phone without any issues. Keep in mind that when calling a MagicJack number, the call will be routed through the internet, so both parties should have a stable internet connection for a clear and uninterrupted call. Additionally, standard calling rates may apply depending on your AT&T phone plan, so it's a good idea to check with AT&T for details on any potential charges associated with calling MagicJack numbers.