📱 Model features |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| Model | Mi A2 (128GB) | Redmi Note 9S (128GB) |
| Other model names | Xiaomi Mi A2 M1804D2SG (128GB + 6GB RAM), 小米6X, Xiaomi Wayne | Xiaomi Note 9S (M2003J6A1G Global version) 6GB RAM |
| Country or region available |  
(Global, International), India |
(Global, International) |
| Brand | Xiaomi | Xiaomi |
| Release date | 7/27/2018, Announced: 7/24/2018 | 4/30/2020, Announced: 3/23/2020 |
| Depth | 7.3 millimeters (0.29 inches) | 8.8 millimeters (0.35 inches) |
| Size (width x height) | 75.4 x 158.7 millimeters (2.97 x 6.25 in) | 76.68 x 165.75 millimeters (3.02 x 6.53 in) |
| Weight | 166 grams (5.81 ounces) | 209 grams (7.32 ounces) |
| Build, materials | Aluminum body, glass front | Plastic body, glass front/back |
| Protection against water and others | Not supported | P2i certified: water repellent nano-coating |
🤖 Operating System |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| System version | Android 8.1 Oreo | Android 10 |
| Firmware update | Android 10 | Android 11 |
| User Interface | feature not registered | feature not registered |
⚙️ Processor |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| Chipset | 64bit - Qualcomm Snapdragon 660 (SDM660) (14nm) | 64bit - Qualcomm Snapdragon 720G (SM7125) (8nm) |
| CPU | Octa-Core, 2 processors:
2.2GHz Quad-Core Kryo 260 Gold
1.8GHz Quad-Core Kryo 260 Silver | Octa-Core, 2 processors:
2.3GHz Dual-Core Kryo 465 Gold
1.8GHz Hexa-Core Kryo 465 Silver |
| GPU graphical controller | Qualcomm Adreno 512 (650MHz) | Qualcomm Adreno 618 (750MHz) |
| Performance (benchmark) | AnTuTu: 130927 (v7), 172886 (v8)
Geekbench: 4625 (v4.4), 1157 (v5.1)
GFXBench: 8.6fps (ES 3.1 onscreen) | AnTuTu: 279625 (v8)
Geekbench: 1785 (v5.1)
GFXBench: 15fps (ES 3.1 onscreen) |
💽 Memory and storage |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| RAM memory | 6GB LPDDR4X | 6GB LPDDR4X |
| Internal storage | 128GB (111GB available)
eMMC 5.1 | 128GB (106GB available)
UFS 2.1 |
| External storage | Not supported | Until 512GB microSD, microSDXC
(dedicated slot) |
📲 Display |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| Display type | LTPS IPS LCD | TFT IPS LCD |
| Screen size | 5.99" inches | 6.67" inches |
| Screen-to-body ratio | ~77.4% (screen-to-body ratio) | ~84.5% (screen-to-body ratio) |
| Display resolution | 1080x2160 pixels (19:9) | 1080x2400 pixels (20:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 403 PPI | 395 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 5 | Gorilla Glass 5 |
| Display features | 60Hz | 60Hz, 450nits[typ]
HDR10 |
📶 Mobile networks |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Dual-SIM Standby - Call active on one sim card
(dedicated slot) |
| SIM card | 2 slots (Dual-SIM)
nano-SIM (4FF) | 2 slots (Dual-SIM)
nano-SIM (4FF) |
| Maximum download/upload | 600/150 Mbps | 800/150 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G, 4G |
| Frequency, bands | Expand band detailsCollapse details |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | Global version:
UMTS 850/900/1700/1900/2100
India version:
UMTS 850/900/1900/2100 | UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat12
VoLTE
Global version:
LTE (Bands 1, 2, 3, 4, 5, 7, 8, 20)
TD-LTE (Bands 38, 40)
India version:
LTE (Bands 1, 3, 5)
TD-LTE (Bands 40, 41) | LTE Cat15/13 (Bands 1, 2, 3, 4, 5, 7, 8, 20, 28)
TD-LTE (Bands 38, 40)
VoLTE |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | GPRS, EDGE |
📷 Camera |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| Back camera (main camera) | (dual camera)
12 megapixels
20MPf/1.81/2.8"1.0µm | (quad camera)
48 megapixels
8MP ultrawidef/2.213mm1/4"1.12µm119°
5MP macrof/2.41.12µmAF
2MP depthf/2.4 |
| Main camera resolution | 4000x3000 pixels | 8000x6000 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 30 fps | 4K UHD (3840x2160) 30 fps |
| Flash | Dual-LED on main camera and LED on front camera | LED flash |
| Focal aperture | f/1.8 (aperture) | f/2.0 (aperture) |
| Focal length | feature not registered | 26mm lens |
| Sensor size | 1/2.9" inches | 1/2" inches |
| Pixel size | 1.25µm pixel | 0.8µm pixel |
| Autofocus | PDAF: phase detection autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | EIS: Digital stabilization |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Not supported | Not supported |
| HDR | HDR photo on both cameras | HDR photo on both cameras |
| Camera extras | feature not registered | feature not registered |
📸 Front camera |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| Front camera (secondary) | 20 megapixels | 16 megapixels |
| Front camera resolution | 5164x3872 pixels | 4608x3456 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | LED | Not supported |
| Focal aperture | f/2.2 (aperture) | f/2.5 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/2.8" inches | 1/3.06" inches |
| Pixel size | 1µm pixel | 1µm pixel |
🔉 Sound and multimedia |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | Not supported | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, OGG, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| USB | USB 2.0 Type-C reversible connector | USB 2.0 Type-C, USB OTG On-The-Go |
| Audio output | Type-C jack with 3.5mm jack adapter | 3.5mm jack |
| TV output | Not supported | USB Type-C (reversible) |
| Bluetooth | 5.0 + A2DP/LE | 5.0 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO
WiFi Direct, hotspot | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO
WiFi Direct, hotspot |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, BeiDou | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| NFC | Not supported | Not supported |
| Infrared port | Supported | Supported |
🧭 Sensors |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| Sensors | Accelerometer
Ambient Light sensor
Compass
Face unlock
Fingerprint sensor (rear-mounted)
Gyroscope
Hall effect
Proximity sensor | Accelerometer
Ambient Light sensor
Compass
Face unlock
Fingerprint sensor (side-mounted)
Gyroscope
Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| Battery type | LiPo: Li-Ion polymer (Non removable) | LiPo: Li-Ion polymer (Non removable) |
| Battery capacity | 3000 mAh | 5020 mAh |
| Charger, watts | 18W Fast battery charging
Quick Charge 4 | 18W Fast battery charging |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | - Colors: Black, Gold, Blue, Red, Rose Gold
- Android One
- Back camera sensor: Sony IMX486/IMX376
- Front camera sensor: Sony IMX376
- WiFi display | - Colors: Aurora Blue, Glacier White, Interstellar Black
- MIUI 11 |
☢️ Radiation rate |
| Xiaomi Mi A2 (128GB) | Xiaomi Redmi Note 9S (128GB) |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.96W/kg (head), 0.64W/kg (body) | 0.96W/kg (head), 0.4W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | 1.16W/kg (head), 0.66W/kg (body) | 0.72W/kg (head), 0.98W/kg (body) |