A:Answer Hi Anna,
Yes, an iPhone 15 Pro Max or 14 Pro Max purchased in the US will work in Europe with a local SIM card. However, you will need to make sure that the phone is unlocked. An unlocked phone can be used on any carrier, while a locked phone can only be used on the carrier it is locked to.
To check if a phone is unlocked, you can contact the carrier it is locked to or ask a Best Buy employee for assistance.
Once you have confirmed that the phone is unlocked, you can purchase a SIM card from a local carrier in Europe and activate it on your phone.
I hope this information is helpful. Please let me know if you have any other questions.
I hope you have a wonderful time in Europe if you're planning going over there, and that you're able to stay connected with your loved ones using your new iPhone!