Microsoft Lumia 640 LTE Dual Sim vs. Microsoft Surface Duo

Phone Comparison, Reviews and Tests

In depth comparison and review of Microsoft Lumia 640 LTE Dual Sim and Microsoft Surface Duo. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.

Phone Specifications Comparison

Microsoft Lumia 640 LTE Dual Sim vs. Microsoft Surface Duo Comparison Chart
DESIGN AND DIMENSIONS Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
Product Type Smartphone Smartphone
Form Factor Touch Folder - dual screen
Height 141.3 mm 145.2 mm Microsoft Surface Duo has greater height than Microsoft Lumia 640 LTE Dual Sim.
Width 72.2 mm 93.3 mm Microsoft Surface Duo has greater width than Microsoft Lumia 640 LTE Dual Sim.
Depth 8.8 mm 9.9 mm Microsoft Lumia 640 LTE Dual Sim is narrower than Microsoft Lumia 640 LTE Dual Sim.
Weight 145 g 250 g Microsoft Lumia 640 LTE Dual Sim is lighter than Microsoft Lumia 640 LTE Dual Sim.
Dimensions Details - Unfolded - 186.9 mm x 4.8 mm x 145.2 mm
Body Colour Black Glacier
Waterproof (Water-resistant) - -
SAR Value 0.75 W/kg (body), 0.88 W/kg (head) 0.726 W/kg (head), 1.478 W/kg (body)
Integrated Components FM radio -
Connector Type Micro-USB - 5 pin Micro-USB Type B
Headset / AV composite out - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
SIM Card Type (Size) Micro SIM Nano SIM, Electronic SIM card (e-SIM)
SIM Card Qty Dual-SIM Dual-SIM
DISPLAY Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
Display Type LCD display OLED display
Display Technology IPS AMOLED
Foldable Display - Yes
Display Design - Both directions folding
Screen Size (Display Size) 5" 5.6" Microsoft Surface Duo has larger screen size than Microsoft Lumia 640 LTE Dual Sim.
Screen Resolution (Display Resolution) 1280 x 720 pixels 1800 x 1350 pixels Microsoft Surface Duo has better screen resolution than Microsoft Lumia 640 LTE Dual Sim.
Display Format HD -
Pixel Density 294 ppi 401 ppi Microsoft Surface Duo has better pixel density than Microsoft Lumia 640 LTE Dual Sim.
Aspect Ratio - 4:3
Colour Depth 16.7 million colours -
Display Features ClearBlack PixelSense Fusion Displays
Display Protection (Screen Protector) Corning Gorilla Glass 3 (scratch resistant glass) Corning Gorilla Glass (scratch resistant glass)
SECOND DISPLAY
Second Display Type - OLED display - colour
Second Display Screen Size - 5.6"
Second Display Resolution - 1800 x 1350 pixels
UNFOLDED DISPLAY
Unfolded Display Screen Size - 8.1 in
Unfolded Display Resolution - 2700 x 1800 pixels
PROCESSOR Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
Processor Type (CPU) Qualcomm Snapdragon 400 Qualcomm Snapdragon 855
Clock Speed 1.2 GHz -
Processor Core Qty Quad-core 8-core Microsoft Surface Duo has higher processor core quantity than Microsoft Lumia 640 LTE Dual Sim.
MEMORY Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
RAM 1 GB 6 GB Microsoft Surface Duo has more RAM than Microsoft Lumia 640 LTE Dual Sim.
Internal Memory Size (Storage Capacity) 8 GB 128 GB Microsoft Surface Duo has more internal memory than Microsoft Lumia 640 LTE Dual Sim.
Memory Interface - UFS 3.0
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 128 GB -
CAMERA Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
MAIN CAMERA
Number of Main Cameras 1 0
Sensor Resolution 8 Megapixel -
Sensor Type BSI -
Lens Aperture F/2.2 -
Focus Adjustment Automatic -
Minimum Focal Length (Focal Distance) 28 mm -
Digital Zoom 4x -
Camera Modes Selfie mode -
Light Source LED light -
Video Resolutions 1920 x 1080 (1080p) -
Camera Features (Functions) Lumia Refocus, Rich Capture function, Dynamic Flash -
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 0.9 Megapixel 11 Megapixel Microsoft Surface Duo has better front camera resolution than Microsoft Lumia 640 LTE Dual Sim.
Lens Type (Front) Wide-angle lens -
Lens Aperture (Front) F/2.4 F/2.0 Microsoft Surface Duo has better front lens aperture than Microsoft Lumia 640 LTE Dual Sim.
Field of View (Front) - 84 degree(s)
Pixel Size (Front) - 1 μm
Special Effects (Front) - HDR
Camera Modes (Front) - Burst mode, Panorama, low-light shots, Portrait mode with adjustable depth control
Light Source (Front) - High CRI LED flash
Video Resolutions (Front) 1280 x 720 (720p) 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps
Camera Features (Front) - Phase Detect Auto-Focus (PDAF), FOV optimised with AI (for front and rear), dynamic range scene detection, Super-resolution zoom, super zoom up to 7x, gyro-based digital video stabilisation
BATTERY AND CHARGING Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
Battery Capacity (Battery Size) 2500 mAh 3577 mAh Microsoft Surface Duo has larger battery capacity than Microsoft Lumia 640 LTE Dual Sim.
Standby Time 864 hours 240 hours Microsoft Lumia 640 LTE Dual Sim has longer standby time than Microsoft Surface Duo.
Talk Time 1590 minutes 1620 minutes Microsoft Surface Duo has longer battery life when making calls than Microsoft Lumia 640 LTE Dual Sim.
Run Time Details Talk (GSM): up to 1590 min
Talk (WCDMA): up to 1050 min
Playback (video): up to 8.6 hrs
Playback (Music): up to 86 hrs
Active online usage (Wi-Fi): up to 10.8 hrs
Standby: up to 864 hrs
Standby: up to 240 hrs
Talk: up to 1620 min
Playback (local video): up to 15.5 hrs
Battery Technology Lithium Ion -
CELLULAR Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 4G Both phones have the same mobile network generation.
Operating System Windows Phone OS 8.1 with Lumia Denim update (upgradable to Windows 10) Android 10
Intelligent Assistant Cortana Google Assistant
Navigation A-GPS, GLONASS, BeiDou GPS, GLONASS, BeiDou, Galileo, QZSS
COMMUNICATIONS Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE GPRS, FDD-LTE, TDD-LTE, LAA
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM 850 GSM, 900 GSM, 1800 GSM, 1900 GSM
3G UMTS Band - Band 1, Band 2, Band 5, Band 8
3G UMTS Frequency - 2100, 1900, 850, 900
4G LTE Band Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 20, Band 28, Band 38, Band 40 Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 14, Band 19, Band 20, Band 25, Band 26, Band 28, Band 29, Band 30, Band 38, Band 39, Band 40, Band 41, Band 46, Band 66
4G LTE Frequency FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300 FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700 PS, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 700d, FDD 2300 WCS, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 5150, FDD 1700 - 2110 AWS-3
Wireless Interface IEEE 802.11b/g/n IEEE 802.11ac
Bluetooth Bluetooth 4.0 Bluetooth 5.0
Bluetooth Profiles HFP, OPP, PAN, A2DP, AVRCP, HID, PBAP, MAP, GATT -
NFC Yes - Microsoft Lumia 640 LTE Dual Sim has NFC reader for mobile payments.
WLAN Security WEP, WPA, WPA2, TKIP, AES, EAP SIM, EAP-TTLS/MSCHAPv2, EAP-AKA, EAP-TLS, PEAPv0/EAP-MSCHAPv2 -
Communication Features Mobile Email client, Internet browser -
Messaging Services Skype, WhatsApp, SMS, MMS -
MEDIA Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
Supported Digital Audio Standards AMR, MP3, AAC-LC, GSM FR WAV, AAC, AMR, MP3, FLAC, OGG, MIDI, M4A, apt-X, IMY, RTTTL, RTX, OTA, MID
Supported Digital Video Standards VC-1, AVC, MPEG-4, WMV, H.264, H.263 MKV, FLV, AVI, MOV, WMV, 3GP, TS, WebM, H.265 HEVC, MP4
Sound Enhancements - Qualcomm aptX audio
FEATURES Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
Phone Functions Speakerphone, voice control, call timer, conference call, flight mode, vibrating alert Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert
Sensors Accelerometer, ambient light sensor, proximity sensor, magnetometer Proximity sensor, hall sensor, dual accelerometers, dual gyroscope, dual magnetometer, dual ambient light sensor
Security Devices - Fingerprint reader (side)
Personal Information Management Calendar, synchronization with PC, calculator, reminder, alarm clock -
Additional Phone Features TTY compatible, DLNA Certified, Text-to-Speech (text recognition), sharing media via DLNA, Kid's Corner, Noise Cancellation Technology, Lumia Color profile, Word Flow keyboard, Power Saving Mode, SensorCore technology, Projection Screen MIMO technology, Fast Charging, dual microphones with noise suppression and echo cancellation, Full Duplex communication, 360° hinge, stylus support, two apps side-by-side
OTHERS Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo
Included Accessories Power adapter SIM card removal tool, USB-C headphones, 18W charger, Surface Duo Bumper (Glacier)
Compliant Standards SSL v3, TLS v1.2, TLS v1.0, TLS v1.1, Suite B ciphers -
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