Microsoft Lumia 640 Dual SIM vs ZTE Xiang

Compare recorded specifications, size and practical differences.

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Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

  • Weight

    Xiang: 25 g lighter

    Lumia 640 Dual SIM:
    145 g
    Xiang:
    120 g
  • Width

    Xiang: 6.2 mm narrower

    Lumia 640 Dual SIM:
    72.2 mm
    Xiang:
    66 mm
  • Screen diagonal

    Xiang: 2.5 in smaller diagonal

    Lumia 640 Dual SIM:
    5 in
    Xiang:
    2.5 in
  • Chipset

    Lumia 640 Dual SIM:
    Qualcomm MSM8926 Snapdragon 400 (28 nm)
    Xiang:
    Qualcomm MSM7225 Snapdragon S1
  • Depth

    Lumia 640 Dual SIM: 3.1 mm thinner

    Lumia 640 Dual SIM:
    8.8 mm
    Xiang:
    11.9 mm
  • Height

    Xiang: 27.3 mm shorter

    Lumia 640 Dual SIM:
    141.3 mm
    Xiang:
    114 mm

Physical size

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

  1. 1. Lumia 640 Dual SIM

    Height:
    141.3 mm +27.3 mm versus Xiang
    Width:
    72.2 mm +6.2 mm versus Xiang
    Depth:
    8.8 mm
  2. 2. Xiang

    Height:
    114 mm
    Width:
    66 mm
    Depth:
    11.9 mm +3.1 mm versus Lumia 640 Dual SIM

Weight

Bars start at zero and share a scale within this chart.

  1. 1. Lumia 640 Dual SIM

    145 g

    +25 g versus Xiang

  2. 2. Xiang

    120 g

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

  1. 1. Lumia 640 Dual SIM

    Screen diagonal:
    5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    68.9 cm²
  2. 2. Xiang

    Screen diagonal:
    2.5 in
    Aspect ratio (height:width):
    4:3
    Approximate rectangular screen area:
    19.4 cm²

Lumia 640 Dual SIM has approximately 256.1% more rectangular screen area than Xiang.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Recorded RAM for Lumia 640 Dual SIM, Xiang, compared at the same storage capacity.
StorageLumia 640 Dual SIMXiang
8 GB 1 GB RAM Unknown
Xiang: Original memory entry

256 MB RAM · 128 MB ROM

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. Lumia 640 Dual SIM

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 256 GB (dedicated slot)

2. Xiang

NFC:
Unknown
Headphone jack:
No
Memory card support:
See details microSD · up to 8 GB (dedicated slot)

Battery capacity

Capacity is not battery life. No endurance test is implied.

Recorded battery capacity

Bars start at zero and share a scale within this chart.

  1. 1. Lumia 640 Dual SIM

    2500 mAh

    +1200 mAh versus Xiang

  2. 2. Xiang

    1300 mAh

Specifications

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

1. Lumia 640 Dual SIM2. Xiang

Everyday essentials
Everyday essentials — specifications for Lumia 640 Dual SIM, Xiang.
SpecificationLumia 640 Dual SIMXiang
Dimensions (HxWxD)
  • 141.3 Х 72.2 Х 8.8 mm
  • 114 Х 66 Х 11.9 mm
Weight
  • 145 g
  • 120 g
Technology
  • IPS LCD
  • TFT
Screen size
  • 5" inch
  • 2.5" inch
Screen resolution
  • 720 x 1280 px
  • 320 x 240 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 8 GB
  • 1 GB RAM
  • 256 MB RAM
  • 128 MB ROM
Memory card support
  • microSD
  • up to 256 GB (dedicated slot)
  • microSD
  • up to 8 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 2500 mAh
  • Removable Li-Ion
  • 1300 mAh
  • Removable Li-Ion
Operating system OS
  • Microsoft Windows Phone 8.1
  • upgradable to Microsoft Windows 10
  • Microsoft Windows Mobile 6.1 Professional
Chipset
  • Qualcomm MSM8926 Snapdragon 400 (28 nm)
  • Qualcomm MSM7225 Snapdragon S1
Headphone jack
  • Yes
  • No
Display
Display — specifications for Lumia 640 Dual SIM, Xiang.
SpecificationLumia 640 Dual SIMXiang
Touchscreen
  • capacitive touchscreen
  • resistive touchscreen
Display colors
  • 16M
  • 65K
Screen area
  • 68.9 cm2
  • 19.4 cm2
Screen format
  • 16:9 (height:width)
  • 4:3 (height:width)
Screen to body ratio
  • 67.6%
  • 25.7%
PPI /points per inch/
  • 294 PPI
  • 160 PPI
Screen protection
  • Corning Gorilla Glass 3
Unknown
Camera and Video
Camera and Video — specifications for Lumia 640 Dual SIM, Xiang.
SpecificationLumia 640 Dual SIMXiang
Rear camera, main
  • 8 MP
  • Single
  • 3.2 MP
  • Single
Camera specs
  • 8 MP
  • f/2.2
  • 28mm (wide)
  • 1/4''
  • AF
  • 3.2 MP
  • AF
Functions
  • LED flash
  • LED flash
Video
  • 720p
  • Yes
Front camera, selfie
  • 1 MP
  • Single
  • 0.3 MP
  • Single
Specifications
  • 1 MP
Unknown
Performance
Performance — specifications for Lumia 640 Dual SIM, Xiang.
SpecificationLumia 640 Dual SIMXiang
Processor CPU
  • Quad-core 1.2 GHz Cortex-A7
  • 528 MHz ARM 11
Graphics processor GPU
  • Adreno 305
  • No
General specs
General specs — specifications for Lumia 640 Dual SIM, Xiang.
SpecificationLumia 640 Dual SIMXiang
Release date
  • 2015
  • March
  • 2009
Colors
  • Glossy cyan
  • Orange
  • White
  • Matte Black
  • Black
  • Silver
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 170 EUR
Unknown
Battery life
  • Stand by time- Up to 840 h (2G) / Up to 840 h (3G) Talking time- Up to 27 h 30 min (2G) / Up to 20 h 30 min (3G)
  • Stand by time- Up to 200 h Talking time- Up to 4 h
Communication and Connectivity
Communication and Connectivity — specifications for Lumia 640 Dual SIM, Xiang.
SpecificationLumia 640 Dual SIMXiang
SIM card
  • Dual SIM (Micro-SIM
  • dual stand-by)
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
Speed
  • HSPA 42.2/5.76 Mbps
  • HSPA 7.2/0.384 Mbps
GPRS
  • Yes
  • Class 10
Edge
  • Yes
  • Class 10
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • DLNA
  • hotspot
  • Wi-Fi 802.11b/g
GPS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
  • Yes
  • with A-GPS
USB
  • microUSB 2.0
  • microUSB 2.0
Bluetooth
  • 4.0
  • A2DP
  • 2.0
  • A2DP
Music and Audio
Music and Audio — specifications for Lumia 640 Dual SIM, Xiang.
SpecificationLumia 640 Dual SIMXiang
Radio
  • FM radio
  • Stereo FM radio
  • RDS
Others
  • ClearBlack display
Unknown
Other features
Other features — specifications for Lumia 640 Dual SIM, Xiang.
SpecificationLumia 640 Dual SIMXiang
Dop
  • Sensors Accelerometer
  • proximity
  • compass
  • Pocket Office -Organizer -WAV/WMA/eAAC+/MP3 player -MP4/WMV/H.264 player -Voice memo -Predictive text input