Hi, djm5681! Regarding the compatibility of the Samsung Gear S3 Frontier Smartwatch (46 mm), the manual for this device states: Compatible with select devices using Android 4.4 and later or iOS 9.0 and later, with at least 1.5 GB RAM. Supported devices may vary by carrier and device. Some features may not be available. For best results, connect with compatible Samsung Galaxy devices. For additional information on this device, please utilize this link (https://bit.ly/375jP0s) to locate the owner's e-manual where you can find the aforementioned information located on page 12. Thank you for being a part of the family of Samsung! ^Liz