: Built-in 4G LTE support for real-time tracking and voice calls without needing a constant tether to a smartphone.
: Most Chinese-manufactured smartwatches require a specific companion app (found via a QR code in the watch menu) to set "Emergency Contacts." If these contacts aren't synced, the SOS button will have no destination to call. allupgrade aml920 4g 512m none sos work
: Users may see "None" in product listings, which often refers to specific configuration packages (e.g., no extra accessories or a "None-SOS" software profile in some firmware versions). Key Features of the AML920 Series : Built-in 4G LTE support for real-time tracking