Xiaomi Mi A1 vs Microsoft Lumia 640 (Dual-Sim 3G)
Side by side comparison between Xiaomi Mi A1 vs Microsoft Lumia 640 phones, differences, pros, cons and full specifications. What's the better?
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5.5"
IPS
IPS
1080x1920
12
MP
MP
5mp
4GB
RAM
RAM
Octa-core
3080
mAh
mAh
(Non removable)
vs
What's the better phone? Xiaomi Mi A1
The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!
23 Advantages 
6 Advantages | 20 Common items in both devices |
| LTPS IPS LCD / TFT IPS LCD |
| 16 million |
| PDAF: phase detection autofocus / Autofocus |
| HDR photo only main camera |
| f/2.2 (aperture) |
| Capacitive |
| Multitouch |
| +13 specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| Change model | ||
| Model | Xiaomi Mi A1 | Lumia 640 (Dual-Sim 3G) |
| Other model names | Xiaomi A1 MDG2, Xiaomi Mi A1 Android One, Xiaomi Tiffany | Microsoft Lumia 640 3G Dual Sim, Microsoft RM-1109 |
| Country or region available |       (Europe), Hong Kong, India, Indonesia, (Global, International), Vietnam | feature not registered |
| Brand | Xiaomi | Microsoft |
| Release date | 9/12/2017 | 4/1/2015 |
| Depth | 7.3 millimeters (0.29 inches) | 8.8 millimeters (0.35 inches) |
| Size (width x height) | 75.8 x 155.4 millimeters (2.98 x 6.12 in) | 72.2 x 141.3 millimeters (2.84 x 5.56 in) |
| Weight | 165 grams (5.78 ounces) | 145 grams (5.08 ounces) |
| Build, materials | feature not registered | feature not registered |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| Display type | LTPS IPS LCD | TFT IPS LCD |
| Screen size | 5.5" inches | 5" inches |
| Screen-to-body ratio | ~70.8% (screen-to-body ratio) | ~67.6% (screen-to-body ratio) |
| Display resolution | 1080x1920 pixels | 720x1280 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 401 PPI | 294 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 3 | Gorilla Glass 3 |
| Refresh rate | feature not registered | feature not registered |
| Display features | feature not registered | feature not registered |
🤖 Operating System | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| System version | Android 7.1.2 Nougat | Windows Phone 8.1 |
| Firmware update | feature not registered | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| Chipset | 64bit: Qualcomm Snapdragon 625 MSM8953 (14nm) | 32bit: Qualcomm Snapdragon 400 MSM8926 (28nm) |
| CPU | Octa-core, 1 processor: 8x 2GHz ARM Cortex-A53 (Octa-core) | Quad-core, 1 processor: 4x 1.2GHz ARM Cortex-A7 (Quad-core) |
| GPU graphical controller | Qualcomm Adreno 506 650Mhz | Qualcomm Adreno 305 400Mhz |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| RAM memory | 4GB LPDDR3 | 1GB LPDDR2 |
| Internal storage | 64GB (54GB available) | 8GB (3GB available) |
| External storage | Until 256GB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot) | Until 128GB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card (hybrid slot/shares the same microSD slot) | Dual-SIM Standby - Call active on one sim card (dedicated slot) |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) | 2 slots (Dual-SIM) micro-SIM (3FF) |
| Maximum Download / Upload | 300/50 Mbps | 42/5.76 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G |
| Frequency, bands | Expand band details Collapse 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 | UMTS 850/900/1900/2100 | UMTS 850/900/1900/2100 |
| Primary 4G network | LTE Cat6 Global version: LTE 800/850/900/1800/2100/2600 (Bands 1,3,5,7,8,20) TD-LTE 2300/2600 (Bands 38,40) India version: LTE 850/1800/2100 (Bands 1,3,5) TD-LTE 2300/2500 (Bands 40,41) Hong Kong/Indonesia/Russia/Vietnam version: LTE 800/850/900/1700/1800/2100/2600 (Bands 1,3,4,5,7,8,20) TD-LTE 2300/2600 (Bands 38,40) | Not supported |
| 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+ |
| 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 A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| Back camera (main camera) | (dual camera) 12 megapixels 12MP f/2.650mm | 8 megapixels |
| Main camera resolution | 4000x3000 pixels | 3264x2448 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | Dual-LED flash | LED flash |
| Focal aperture | f/2.2 (aperture) | f/2.2 (aperture) |
| Focal length | 26mm (lens) | feature not registered |
| Sensor size | feature not registered | 1/4" inches |
| Pixel size | 1.25µm pixel | feature not registered |
| Autofocus | PDAF: phase detection autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | feature not registered |
| Zoom | Digital and optical zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection |
| BSI sensor | Not supported | Supported |
| HDR | HDR photo only main camera | HDR photo only main camera |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| Front camera (secondary) | 5 megapixels | 1 megapixels |
| Front camera resolution | 2592x1944 pixels | 1280x720 pixels |
| Video recording (secondary) | Full HD (1920x1080) | HD (1280x720) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | 1.12µm pixel | feature not registered |
🔉 Sound and multimedia | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | FM | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, MKV, XviD | MP4, H.264, H.263, WMV |
| Audio formats | MP3, WAV, OGG, eAAC+, FLAC | MP3, WAV, WMA, eAAC+ |
🔌 Connectivity | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| USB | USB 2.0 Type-C reversible connector | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | Not supported |
| Bluetooth | 4.2 + A2DP | 4.0 + A2DP |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, BeiDou | A-GPS, GeoTagging, GLONASS |
| NFC | Not supported | Not supported |
| Infrared port | Supported | Not supported |
🧭 Sensors | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| Sensors | Accelerometer Ambient light sensor Fingerprint sensor Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor Compass Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Removable) |
| Battery capacity | 3080 mAh | 2500 mAh |
| Charger, watts | 10W (5V/2A) Wired charging | Wired charging |
| Inductive / wireless charging | feature not registered | feature not registered |
| Talk time autonomy | feature not registered | 20 hours |
| Standby | feature not registered | 840 hours (35 days) |
➕ Other features | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder |
| 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, Rose gold • Android One • Aluminum frame and back • Oleophobic coating screen • 450nit brightness screen • 2x optical zoom back camera • 720p@120fps slow motion • Fast battery charging • VoLTE | • Colors: Black • Lumia Denim UI • Microsoft ClearBlack display • OneDrive 30GB • Beidou GPS • WiFi hotspot |
☢️ Radiation rate | ||
| Xiaomi Mi A1 | Microsoft Lumia 640 (Dual-Sim 3G) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |