Salutations, thanks for taking the available time out of your busy day to ask us your question about the Samsung Galaxy Tab S9. It may be possible to utilize your mobile hotspot, if available, to provide an internet connection to your Galaxy Tab S9 in the absence of a Wi-Fi connection. We recommend reaching out to AT&T to ensure that you have the correct mobile plan in place in order to accomplish this before incurring any unnecessary charges to your monthly bill. Feel free to contact Samsung Support if we can further assist you. Thank you for being a faithful Samsung customer. - Debra