O2 XDA Comet vs Oppo R821T FInd Muse

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.

  • Width

    XDA Comet: 5.5 mm narrower

    XDA Comet:
    58 mm
    R821T FInd Muse:
    63.5 mm
  • Screen diagonal

    XDA Comet: 1.3 in smaller diagonal

    XDA Comet:
    2.7 in
    R821T FInd Muse:
    4 in
  • Depth

    R821T FInd Muse: 9.1 mm thinner

    XDA Comet:
    19 mm
    R821T FInd Muse:
    9.9 mm
  • Height

    XDA Comet: 17 mm shorter

    XDA Comet:
    106 mm
    R821T FInd Muse:
    123 mm
  • Release year

    XDA Comet:
    2007
    R821T FInd Muse:
    2013

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. XDA Comet

    Height:
    106 mm
    Width:
    58 mm
    Depth:
    19 mm +9.1 mm versus R821T FInd Muse
    Weight:
    145 g
  2. 2. R821T FInd Muse

    Height:
    123 mm +17 mm versus XDA Comet
    Width:
    63.5 mm +5.5 mm versus XDA Comet
    Depth:
    9.9 mm
    Weight:
    Unknown

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. XDA Comet

    Screen diagonal:
    2.7 in
    Aspect ratio (height:width):
    4:3
    Approximate rectangular screen area:
    22.6 cm²
  2. 2. R821T FInd Muse

    Screen diagonal:
    4 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    45.5 cm²

R821T FInd Muse has approximately 101.7% more rectangular screen area than XDA Comet.

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.

XDA Comet: Original memory entry

64 MB RAM · 1 GB ROM

R821T FInd Muse: Original memory entry

4 GB · 512 MB 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. XDA Comet

NFC:
Unknown
Headphone jack:
No
Memory card support:
See details miniSD

2. R821T FInd Muse

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.

At least two unambiguous positive capacity values are needed for a chart. Original entries remain in the specifications.

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. XDA Comet2. R821T FInd Muse

Everyday essentials
Everyday essentials — specifications for XDA Comet, R821T FInd Muse.
SpecificationXDA CometR821T FInd Muse
Dimensions (HxWxD)
  • 106 Х 58 Х 19 mm
  • 123 Х 63.5 Х 9.9 mm
Weight
  • 145 g
  • 0 g
Technology
  • TFT
  • IPS LCD
Screen size
  • 2.7" inch
  • 4" inch
Screen resolution
  • 240 x 320 px
  • 480 x 800 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 64 MB RAM
  • 1 GB ROM
  • 4 GB
  • 512 MB RAM
Memory card support
  • miniSD
  • microSD
  • up to 32 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 0 mAh,
  • 1700 mAh
  • Removable Li-Ion
Operating system OS
  • Microsoft Windows Mobile 6.0 Professional
  • Android 4.2 (Jelly Bean)
Chipset Unknown
  • Mediatek MT6572 (28 nm)
Headphone jack
  • No
  • Yes
Display
Display — specifications for XDA Comet, R821T FInd Muse.
SpecificationXDA CometR821T FInd Muse
Touchscreen
  • resistive touchscreen
  • capacitive touchscreen
Display colors
  • 65K
  • 16M
Screen area
  • 22.6 cm2
  • 45.5 cm2
Screen format
  • 4:3 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 36.7%
  • 58.3%
PPI /points per inch/
  • 148 PPI
  • 233 PPI
Camera and Video
Camera and Video — specifications for XDA Comet, R821T FInd Muse.
SpecificationXDA CometR821T FInd Muse
Rear camera, main
  • 2 MP
  • Single
  • 3.15 MP
  • Single
Camera specs
  • 2 MP
  • 3.15 MP
Functions
  • LED flash
Unknown
Video
  • Yes
  • Yes
Front camera, selfie
  • 0.3 MP
  • Single
  • 0.3 MP
  • Single
Specifications
  • VGA videocall camera
  • VGA
Performance
Performance — specifications for XDA Comet, R821T FInd Muse.
SpecificationXDA CometR821T FInd Muse
Processor CPU
  • Intel XScale PXA 270 620 MHz
  • Dual-core 1.2 GHz Cortex-A7
Graphics processor GPU Unknown
  • Mali-400
General specs
General specs — specifications for XDA Comet, R821T FInd Muse.
SpecificationXDA CometR821T FInd Muse
Release date
  • 2007
  • September
  • 2013
Colors
  • Silver
  • White
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 290 EUR
Battery life
  • Stand by time- Up to 200 h Talking time- Up to 6 h
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for XDA Comet, R821T FInd Muse.
SpecificationXDA CometR821T FInd Muse
SIM card
  • Mini-SIM
  • Dual SIM (Mini-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 900 / 1800 / 1900
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
Speed
  • HSPA
  • HSPA
GPRS
  • Class 10
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11b/g
  • Wi-Fi 802.11 b/g
  • hotspot
GPS
  • No
  • Yes
  • with A-GPS
USB
  • miniUSB
  • microUSB 2.0
Bluetooth
  • 1.2
  • Yes
Music and Audio
Music and Audio — specifications for XDA Comet, R821T FInd Muse.
SpecificationXDA CometR821T FInd Muse
Radio
  • Stereo FM radio
  • RDS
  • FM radio
Others
  • Handwriting recognition
Unknown
Other features
Other features — specifications for XDA Comet, R821T FInd Muse.
SpecificationXDA CometR821T FInd Muse
Dop
  • Infrared port - Pocket Office -Voice memo -MP3/AAC player
  • Sensors Accelerometer
  • proximity