Microsoft Lumia 640 LTE Dual Sim vs. Microsoft Surface Duo 2

Phone Comparison, Reviews and Tests

In depth comparison and review of Microsoft Lumia 640 LTE Dual Sim and Microsoft Surface Duo 2. 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 2 Comparison Chart
DESIGN AND DIMENSIONS Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo 2
Product Type Smartphone Smartphone
Form Factor Touch Folder - dual screen
Height 141.3 mm 145.2 mm Microsoft Surface Duo 2 has greater height than Microsoft Lumia 640 LTE Dual Sim.
Width 72.2 mm 92.1 mm Microsoft Surface Duo 2 has greater width than Microsoft Lumia 640 LTE Dual Sim.
Depth 8.8 mm 11 mm Microsoft Lumia 640 LTE Dual Sim is narrower than Microsoft Lumia 640 LTE Dual Sim.
Weight 145 g 284 g Microsoft Lumia 640 LTE Dual Sim is lighter than Microsoft Lumia 640 LTE Dual Sim.
Dimensions Details - Unfolded - 184.5 mm x 5.5 mm x 145.2 mm
Body Colour Black Glacier | Obsidian
Body Material - Corning Gorilla Glass
Waterproof (Water-resistant) - -
Repairability Index - 3.9 (out of 10)
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 2
Display Type LCD display OLED display
Display Technology IPS AMOLED
Foldable Display - Yes
Display Design - Both directions folding
Screen Size (Display Size) 5" 5.8" Microsoft Surface Duo 2 has larger screen size than Microsoft Lumia 640 LTE Dual Sim.
Screen Resolution (Display Resolution) 1280 x 720 pixels 1344 x 1892 pixels Microsoft Surface Duo 2 has better screen resolution than Microsoft Lumia 640 LTE Dual Sim.
Display Format HD -
Pixel Density 294 ppi 401 ppi Microsoft Surface Duo 2 has better pixel density than Microsoft Lumia 640 LTE Dual Sim.
Aspect Ratio - 13:9
Max Brightness - 800 cd/m²
Colour Depth 16.7 million colours -
HDR - Yes Microsoft Surface Duo 2 has HDR.
Display Refresh Rate - 90 Hz
Display Features ClearBlack DCI-P3 Wide colour gamut, 100% sRGB, Dual PixelSense Fusion Displays
Display Protection (Screen Protector) Corning Gorilla Glass 3 (scratch resistant glass) Corning Gorilla Glass Victus (scratch resistant glass)
SECOND DISPLAY
Second Display Type - OLED display - colour
Second Display Screen Size - 5.8"
Second Display Resolution - 1344 x 1892 pixels
UNFOLDED DISPLAY
Unfolded Display Screen Size - 8.3 in
Unfolded Display Resolution - 2688 x 1892 pixels
PROCESSOR Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo 2
Processor Type (CPU) Qualcomm Snapdragon 400 Qualcomm Snapdragon 888 5G
Clock Speed 1.2 GHz -
Processor Core Qty Quad-core 8-core Microsoft Surface Duo 2 has higher processor core quantity than Microsoft Lumia 640 LTE Dual Sim.
MEMORY Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo 2
RAM 1 GB LPDDR5 SDRAM - 8 GB Microsoft Surface Duo 2 has more RAM than Microsoft Lumia 640 LTE Dual Sim.
Internal Memory Size (Storage Capacity) 8 GB 128 GB Microsoft Surface Duo 2 has more internal memory than Microsoft Lumia 640 LTE Dual Sim.
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 128 GB -
CAMERA Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo 2
MAIN CAMERA
Number of Main Cameras 1 3
Sensor Resolution 8 Megapixel 12 Megapixel Microsoft Surface Duo 2 has better camera resolution than Microsoft Lumia 640 LTE Dual Sim.
Sensor Type BSI -
Lens Aperture F/2.2 F/1.7 Microsoft Surface Duo 2 has better lens aperture than Microsoft Lumia 640 LTE Dual Sim.
Pixel Size - 1.4 μm
Optical Image Stabiliser (OIS) - Optical Image Stabiliser (OIS) Microsoft Surface Duo 2 has optical stabilisation.
Focus Adjustment Automatic -
Minimum Focal Length (Focal Distance) 28 mm -
Digital Zoom 4x 10x Microsoft Surface Duo 2 has better digital zoom than Microsoft Lumia 640 LTE Dual Sim.
Special Effects - HDR
Camera Modes Selfie mode Night mode, Auto mode, low-light shots, Panorama mode with wide dynamic range, slow motion video at 120 or 240fps
Light Source LED light Dual LED flash
Video Resolutions 1920 x 1080 (1080p) 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 (Functions) Lumia Refocus, Rich Capture function, Dynamic Flash Dual Pixel Phase Detect Auto-Focus (PDAF), Smooth Zoom, HEVC (High Efficiency Video coding), HDR video recording, multi-frame photo capture, dynamic range scene detection
SECOND CAMERA
Sensor Resolution (2nd Camera) - 12 Megapixel
Lens Type (2nd Camera) - Telephoto lens
Lens Aperture (2nd Camera) - F/2.4
Pixel Size (2nd Camera) - 1 μm
Optical Image Stabiliser (OIS) - Optical Image Stabiliser (OIS) Microsoft Surface Duo 2 has optical stabilisation of the second camera.
Optical Zoom - 2x
Camera Features (2nd Camera) - Phase Detect Auto-Focus (PDAF)
THIRD CAMERA
Sensor Resolution (3rd Camera) - 16 Megapixel
Lens Type (3rd Camera) - Ultra wide-angle lens
Lens Aperture (3rd Camera) - F/2.2
Field of View (3rd Camera) - 110 degree(s)
Pixel Size (3rd Camera) - 1 μm
Camera Features (3rd Camera) - Field of view, distortion correction
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 0.9 Megapixel 12 Megapixel Microsoft Surface Duo 2 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 2 has better front lens aperture than Microsoft Lumia 640 LTE Dual Sim.
Pixel Size (Front) - 1 μm
Video Resolutions (Front) 1280 x 720 (720p) -
BATTERY AND CHARGING Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo 2
Battery Capacity (Battery Size) 2500 mAh 4449 mAh Microsoft Surface Duo 2 has larger battery capacity than Microsoft Lumia 640 LTE Dual Sim.
Standby Time 864 hours -
Talk Time 1590 minutes 1680 minutes Microsoft Surface Duo 2 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
Talk: up to 1680 min
Playback (local video): up to 15.5 hrs
Battery Technology Lithium Ion -
CELLULAR Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo 2
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 5G Microsoft Surface Duo 2 has more advanced generation mobile network.
Operating System Windows Phone OS 8.1 with Lumia Denim update (upgradable to Windows 10) Android 11
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 2
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE GPRS, FDD-LTE, TDD-LTE, Gigabit LTE, LAA, 5G NR FR1
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 42, Band 46, Band 48, Band 66, Band 71
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 3500, TDD 5150, TDD 3600, FDD 1700 - 2110 AWS-3, FDD 600
5G NR Band - N1, n2, n3, n5, n7, n20, n28, n38, n41, n66, n71, n77, n78, n79, n25
5G NR Frequency - FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, FDD 600, TDD TD 3700, TDD TD 3500, TDD TD 4500, FDD 1900
Wireless Interface IEEE 802.11b/g/n IEEE 802.11ax
Bluetooth Bluetooth 4.0 Bluetooth 5.1
Bluetooth Profiles HFP, OPP, PAN, A2DP, AVRCP, HID, PBAP, MAP, GATT -
NFC Yes Yes Both phones have an 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 2
Supported Digital Audio Standards AMR, MP3, AAC-LC, GSM FR WAV, AAC, AMR, MP3, FLAC, OGG, MIDI, M4A, apt-X, IMY, RTX, OTA, MID, TWS, RTTL
Supported Digital Video Standards VC-1, AVC, MPEG-4, WMV, H.264, H.263 MKV, FLV, AVI, MOV, MPEG-4, WMV, ASF, 3GP, H.264, TS, M2TS, WebM, HEVC, 3G2, HEIF, H.265 HEVC, HEIC
Sound Enhancements - Qualcomm aptX HD audio, Qualcomm aptX Classic
FEATURES Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo 2
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 Hall sensor, Time of Flight (ToF), dual accelerometers, dual gyroscope, dual magnetometer, dual ambient light sensor, dual proximity 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 battery, Full Duplex communication, dual microphones with AI-based noise suppression and acoustic echo cancellation
OTHERS Microsoft Lumia 640 LTE Dual Sim Microsoft Surface Duo 2
Included Accessories Power adapter SIM card removal tool, USB-C headset, Surface Duo 2 USB-C cable
Compliant Standards SSL v3, TLS v1.2, TLS v1.0, TLS v1.1, Suite B ciphers HEARING AID M4/T3
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