: Some versions listed as "None SOS" might have the physical button but lack the software enabled in that specific regional firmware.
: Bluetooth-enabled call and message notifications, with some versions supporting independent SIM cards for 4G calling. allupgrade aml920 4g 512m none sos work
: Includes 24/7 heart rate, blood oxygen (SpO2), and blood pressure monitoring, along with sleep tracking and sedentary reminders. : Some versions listed as "None SOS" might
: 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 : Users may see "None" in product listings,
: 4G SOS features require an active SIM card with a data plan. If the 4G connection is "None" or inactive, the emergency button cannot dial out or send location data.
: 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.
The "4G 512M" designation typically refers to the device's core communication and memory capabilities: