A:Answer Hi Maxine!
Thank you for reaching out to us. We appreciate your interest in knowing if Galaxy Tab S7 (Wi-Fi) supports SIM cards. We apologize; this tablet model is "Wi-Fi" compatible only. The internal carrier (SIM card) does not support this tablet model.
For your reference, you may visit our website under the "Specs" tab, click on "See All Specs," and look for "Connectivity": https://www.samsung.com/us/mobile/tablets/galaxy-tab-s/galaxy-tab-s7-128gb-mystic-black-wi-fi-sm-t870nzkaxar/#specs.
Should you need more assistance, please feel free to get back to us via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
Reference #: 1144321926
Have a great day.
Melardo