📱 Model features |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
Model | Watch 3 (42mm) | Amazfit T-Rex Pro |
Other model names | Apple Watch Series 3 GPS + Cellular (4G LTE) Stainless Steel | Mi Amazfit TRex Pro |
Country or region available |  (Global, International) |  (Global, International) |
Brand | Apple | Xiaomi |
Release date | 9/22/2017 | 3/23/2021, Announced: 3/5/2021 |
Depth | 11.4 millimeters (0.45 inches) | 13.5 millimeters (0.53 inches) |
Size (width x height) | 36.4 x 42.5 millimeters (1.43 x 1.67 in) | 47.47 x 47.47 millimeters (1.87 x 1.87 in) |
Weight | 53 grams (1.86 ounces) | 59 grams (2.07 ounces) |
Build, materials | Stainless steel body, glass front, ceramic back | Plastic body, glass front |
Protection against water and others | 5 ATM: 50 meters waterproof | 10 ATM: 100 meters waterproof |
🤖 Operating System |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
System version | WatchOS 4.0 | Proprietary OS |
Firmware update | WatchOS 5.0 | feature not registered |
User Interface | feature not registered | RTOS |
⚙️ Processor |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
Chipset | 32bit: Apple S3 (28nm) | 32bit |
CPU | Dual-core, 1 processor: 2x 1GHz ARM Cortex-A7 (Dual-core) | Single-core, 1 processor: Single-core |
GPU graphical controller | PowerVR G6200 | feature not registered |
Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
RAM memory | 768MB LPDDR4 | 512MB LPDDR3 |
Internal storage | 16GB (10GB available) | 4GB (2GB available) eMCP |
External storage | Not supported | Not supported |
📲 Display |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
Display type | AMOLED | AMOLED |
Screen size | 1.65" inches | 1.3" inches |
Screen-to-body ratio | ~55.4% (screen-to-body ratio) | ~24.2% (screen-to-body ratio) |
Display resolution | 390x312 pixels | 360x360 pixels |
Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
Pixel density (dot pitch) | 303 PPI | 392 PPI |
Colors | 16 million | 16 million |
Scratch-resistant glass | Sapphire Glass | Gorilla Glass 3 |
Refresh rate | feature not registered | 60Hz |
Display features | feature not registered | Not supported |
📶 Mobile networks |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
Dual-SIM | Not supported | Not supported |
SIM card | 1 slot (Single-SIM) e-SIM (Eletronic) | Not supported |
Maximum Download / Upload | 150/50 Mbps | feature not registered |
Network technology | 2G, 3G, 4G | feature not registered |
Frequency, bands | Expand band detailsCollapse details |
GSM MHz band | Quad-Band 850/900/1800/1900 | Not supported |
Primary 2G network | GSM 850/900/1800/1900 | Not supported |
Primary 3G network | A1891 model (Europe,Australia): UMTS 800/850/900/2100 A1861 model (USA,LATAM,Canada): UMTS 800/850/1700/1900 A1892 model (China): UMTS 2100 | Not supported |
Primary 4G network | LTE Cat4 A1891 model (Europe,Australia): LTE (Bands 1,3,5,7,8,18,19,20,26) A1861 model (USA,LATAM,Canada): LTE (Bands 2,4,5,12,13,17,18,19,25,26) TD-LTE (Bands 41) A1892 model (China): LTE (Bands 1,3) TD-LTE (Bands 39,40,41) | Not supported |
Primary 5G network | Not supported | Not supported |
Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE | Not supported |
Secondary 2G network | Not supported | Not supported |
Secondary 3G network | Not supported | Not supported |
Secondary 4G network | Not supported | Not supported |
Secondary data network | Not supported | Not supported |
📷 Camera |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
Back camera (main camera) | Not supported | Not supported |
Main camera resolution | Not supported | Not supported |
Video recording (primary) | Not supported | Not supported |
Flash | Not supported | Not supported |
Focal aperture | feature not registered | feature not registered |
Focal length | feature not registered | feature not registered |
Sensor size | feature not registered | feature not registered |
Pixel size | feature not registered | feature not registered |
Autofocus | Not supported | Not supported |
Touch focus | Not supported | Not supported |
Image stabilization | Not supported | Not supported |
Zoom | Not supported | Not supported |
Face/smile detection | Not supported | Not supported |
BSI sensor | Not supported | Not supported |
HDR | Not supported | Not supported |
Camera extras | feature not registered | feature not registered |
📸 Front camera |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
Front camera (secondary) | Not supported | Not supported |
Front camera resolution | Not supported | Not supported |
Video recording (secondary) | Not supported | Not supported |
Front flash | Not supported | Not supported |
Focal aperture | feature not registered | feature not registered |
Focal length | feature not registered | feature not registered |
Sensor size | feature not registered | feature not registered |
Pixel size | feature not registered | feature not registered |
🔉 Sound and multimedia |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
Loudspeaker | Supported | feature not registered |
Active noise cancellation | Not supported | Not supported |
Radio | Not supported | Not supported |
TV | Not supported | Not supported |
Video formats | MP4, H.264, H.263 | feature not registered |
Audio formats | MP3, WAV, eAAC+, FLAC | feature not registered |
🔌 Connectivity |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
USB | Not supported | Not supported |
Audio output | Not supported | Not supported |
TV output | Not supported | Not supported |
Bluetooth | 4.2 + A2DP | 5.0 + A2DP/LE |
WiFi | 802.11 b/g/n (2.4GHz) | Not supported |
DLNA | Not supported | Not supported |
GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS, BeiDou |
NFC | Supported | Not supported |
Infrared port | Not supported | Not supported |
🧭 Sensors |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
Sensors | Accelerometer Ambient Light sensor Barometer Gyroscope Heart rate Pedometer | Accelerometer Ambient Light sensor Barometer Compass Heart rate Pedometer SpO2 |
Vibrating alert | Supported | Supported |
🔋 Battery |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
Battery type | Li-Ion: Lithium-Ion (Non removable) | LiPo: Li-Ion polymer (Non removable) |
Battery capacity | 352 mAh | 390 mAh |
Charger, watts | Wired charging | Wired charging |
Wireless charging | Magnetic charging (dock) | Magnetic charging (dock) |
Talk time autonomy | 18 hours | 432 hours (18 days) |
Standby | feature not registered | 432 hours (18 days) |
➕ Other features |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
Call control | Voice dialing | Not supported |
Messaging | SMS, E-mail | SMS (T9), E-mail |
Hands-free calling | Supported | Not supported |
Video calling | Not supported | Not supported |
Ringtones | Polyphonic and customized | feature not registered |
Web browser | Not supported | Not supported |
Antenna | Internal antenna | feature not registered |
Qwerty physical keyboard | Not supported | Not supported |
Miscellaneous | • Colors: Silver, Space black • Sport band or leather bands (Hermès edition) • 1000 nits screen • 3D Touch display • Siri | • Colors: Black, Gray, Blue • Watch band: 22mm • BioTracker PPG • 100 sports mode • AppZepp app • Compatible with Android 5.0/iOS 10 and above |
☢️ Radiation rate |
| Apple Watch 3 (42mm) | Xiaomi Amazfit T-Rex Pro |
SAR 1.6W/kg (USA, Mexico, etc.) | 0.35W/kg (head), 0.18W/kg (body) | feature not registered |
SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |