Acer M900 vs Xiaomi Redmi Note

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

    M900: 11 g lighter

    M900:
    188 g
    Redmi Note:
    199 g
  • Width

    M900: 16.7 mm narrower

    M900:
    62 mm
    Redmi Note:
    78.7 mm
  • Screen diagonal

    M900: 1.7 in smaller diagonal

    M900:
    3.8 in
    Redmi Note:
    5.5 in
  • Depth

    Redmi Note: 7.6 mm thinner

    M900:
    17.1 mm
    Redmi Note:
    9.5 mm
  • Height

    M900: 35 mm shorter

    M900:
    119 mm
    Redmi Note:
    154 mm
  • Release year

    M900:
    2009
    Redmi Note:
    2014

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. M900

    Height:
    119 mm
    Width:
    62 mm
    Depth:
    17.1 mm +7.6 mm versus Redmi Note
  2. 2. Redmi Note

    Height:
    154 mm +35 mm versus M900
    Width:
    78.7 mm +16.7 mm versus M900
    Depth:
    9.5 mm

Weight

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

  1. 1. M900

    188 g

  2. 2. Redmi Note

    199 g

    +11 g versus M900

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. M900

    Screen diagonal:
    3.8 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    41.1 cm²
  2. 2. Redmi Note

    Screen diagonal:
    5.5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    83.4 cm²

Redmi Note has approximately 102.9% more rectangular screen area than M900.

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.

No unambiguous storage/RAM pairings are recorded. See the original specifications below.

M900: Original memory entry

Super AMOLED

Redmi Note: Original memory entry

8 GB · 1/2 GB RAM

Practical features

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

1. M900

NFC:
See details Super AMOLED
Headphone jack:
See details panorama
Memory card support:
See details microSD (dedicated slot)

2. Redmi Note

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 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. M900

    1530 mAh

  2. 2. Redmi Note

    3100 mAh

    +1570 mAh versus M900

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. M9002. Redmi Note

Everyday essentials
Everyday essentials — specifications for M900, Redmi Note.
SpecificationM900Redmi Note
Dimensions (HxWxD)
  • 119 Х 62 Х 17.1 mm
  • 154 Х 78.7 Х 9.5 mm
Weight
  • 188 g
  • 199 g
Technology
  • TFT
  • IPS LCD
Screen size
  • 3.8" inch
  • 5.5" inch
Screen resolution
  • 480 x 800 px
  • 720 x 1280 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • Super AMOLED
  • 8 GB
  • 1/2 GB RAM
Memory card support
  • microSD (dedicated slot)
  • microSD
  • up to 32 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1530 mAh
  • Removable Li-Ion
  • 3100 mAh
  • Removable Li-Po
Operating system OS
  • Microsoft Windows Mobile 6.1 Professional
  • Android 4.2 (Jelly Bean)
  • upgradable to 4.4.4 (KitKat); MIUI 9.2
Chipset Unknown
  • Mediatek MT6592 (28 nm)
NFC
  • Super AMOLED
Unknown
Headphone jack
  • panorama
  • Yes
Display
Display — specifications for M900, Redmi Note.
SpecificationM900Redmi Note
Touchscreen
  • resistive touchscreen
  • capacitive touchscreen
Display colors
  • 65K
  • 16M
Screen area
  • 41.1 cm2
  • 83.4 cm2
Screen format
  • 5:3 (height:width)
  • 16:9 (height:width)
Screen to body ratio
  • 55.7%
  • 68.8%
PPI /points per inch/
  • 246 PPI
  • 267 PPI
Screen protection Unknown
  • Corning Gorilla Glass 3
Camera and Video
Camera and Video — specifications for M900, Redmi Note.
SpecificationM900Redmi Note
Rear camera, main
  • 5 MP
  • Single
  • 13 MP
  • Single
Camera specs
  • 5 MP
  • AF
  • 13 MP
  • f/2.2
  • 28mm (wide)
  • AF
Functions
  • Dual-LED flash
  • LED flash
  • HDR
Video
  • Yes
  • 1080p@30fps
Front camera, selfie
  • 0.3 MP
  • Single
  • 5 MP
  • Single
Specifications
  • VGA videocall camera
  • 5 MP
Performance

Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.

Performance — specifications for M900, Redmi Note.
SpecificationM900Redmi Note
Processor CPU
  • 533 MHz Samsung S3C 6410
  • Octa-core 1.4/1.7 GHz Cortex-A7
Graphics processor GPU Unknown
  • Mali-450MP4
Antutu 7 score * Unknown
  • 65210
General specs
General specs — specifications for M900, Redmi Note.
SpecificationM900Redmi Note
Release date
  • 2009
  • February
  • 2014
  • March
Colors
  • Black
  • Black
  • White
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 250 EUR
  • 120 EUR
Battery life
  • Stand by time- Up to 470 h Talking time- Up to 4 h
Unknown
Body build Unknown
  • plastic body
Communication and Connectivity
Communication and Connectivity — specifications for M900, Redmi Note.
SpecificationM900Redmi Note
SIM card
  • Single SIM (Mini-SIM)Dual SIM (Mini-SIM/Micro-SIM
  • Dual SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2-3G - HSDPA 900 / 2100-4G - LTE
  • Show all network frequencies: -2G - GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
Speed
  • HSPA 7.2/2 Mbps
  • HSPA
GPRS
  • Class 10
  • Yes
Edge
  • Class 10
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi Direct
  • hotspot
GPS
  • Yes
  • SiRF Star III chipset
  • Yes
  • with A-GPS
  • GLONASS
USB
  • miniUSB
  • microUSB 2.0
  • USB Host
Bluetooth
  • microUSB 2.0
  • A2DP
  • 4.0
  • A2DP
  • LE
Harmful irradiation
  • SAR - 0.43 W/kg (head) 0.92 W/kg (body)
Unknown
Music and Audio
Music and Audio — specifications for M900, Redmi Note.
SpecificationM900Redmi Note
Radio
  • FM radio
  • FM radio
  • recording
Others
  • Handwriting recognition
  • Active noise cancellation with dedicated mic
Other features
Other features — specifications for M900, Redmi Note.
SpecificationM900Redmi Note
Dop
  • Sensors Fingerprint (front-mounted) Pocket Office -Voice memo -MP3 player -Predictive text input
  • Sensors Accelerometer
  • gyro
  • proximity
  • compass