Using an LTE smartwatch as a standalone device (with no phone) : r/GoogleFi
Amazon.com: GPS Android 4G Smartwatch for Men Cellular Phone Watch 4GB+64GB Memory Mini Smartphone 5MP Camera Standalone 4G LTE Cellular Smat Watch SOS Calling : Electronics
Huawei Watch 2 review - Sportier standalone 4G LTE smartwatch with more functions | TechNave
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Best 4G/LTE smartwatches: Untether with our top cellular picks - Wareable
Ticwatch Pro 3 Ultra Gps Smartwatch | Ticwatch Pro 3 Gps Smart Watch - Pro 3 - Aliexpress