Oppo R821T FInd Muse vs Sony Xperia E4

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

    R821T FInd Muse: 11.1 mm narrower

    R821T FInd Muse:
    63.5 mm
    Xperia E4:
    74.6 mm
  • Screen diagonal

    R821T FInd Muse: 1 in smaller diagonal

    R821T FInd Muse:
    4 in
    Xperia E4:
    5 in
  • Chipset

    R821T FInd Muse:
    Mediatek MT6572 (28 nm)
    Xperia E4:
    Mediatek MT6582 (28 nm)
  • Depth

    R821T FInd Muse: 0.6 mm thinner

    R821T FInd Muse:
    9.9 mm
    Xperia E4:
    10.5 mm
  • Height

    R821T FInd Muse: 14 mm shorter

    R821T FInd Muse:
    123 mm
    Xperia E4:
    137 mm
  • Release year

    R821T FInd Muse:
    2013
    Xperia E4:
    2015

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. R821T FInd Muse

    Height:
    123 mm
    Width:
    63.5 mm
    Depth:
    9.9 mm
    Weight:
    Unknown
  2. 2. Xperia E4

    Height:
    137 mm +14 mm versus R821T FInd Muse
    Width:
    74.6 mm +11.1 mm versus R821T FInd Muse
    Depth:
    10.5 mm +0.6 mm versus R821T FInd Muse
    Weight:
    144 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. R821T FInd Muse

    Screen diagonal:
    4 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    45.5 cm²
  2. 2. Xperia E4

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

Xperia E4 has approximately 51.3% more rectangular screen area than R821T FInd Muse.

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 R821T FInd Muse, Xperia E4, compared at the same storage capacity.
StorageR821T FInd MuseXperia E4
8 GB Unknown 1 GB RAM
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. R821T FInd Muse

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB (dedicated slot)

2. Xperia E4

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. R821T FInd Muse

    1700 mAh

  2. 2. Xperia E4

    2300 mAh

    +600 mAh versus R821T FInd Muse

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. R821T FInd Muse2. Xperia E4

Everyday essentials
Everyday essentials — specifications for R821T FInd Muse, Xperia E4.
SpecificationR821T FInd MuseXperia E4
Dimensions (HxWxD)
  • 123 Х 63.5 Х 9.9 mm
  • 137 Х 74.6 Х 10.5 mm
Weight
  • 0 g
  • 144 g
Technology
  • IPS LCD
  • IPS LCD
Screen size
  • 4" inch
  • 5" inch
Screen resolution
  • 480 x 800 px
  • 540 x 960 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 4 GB
  • 512 MB RAM
  • 8 GB
  • 1 GB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • microSD
  • up to 32 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1700 mAh
  • Removable Li-Ion
  • 2300 mAh
  • Non-removable Li-Ion
Operating system OS
  • Android 4.2 (Jelly Bean)
  • Android 4.4.4 (KitKat)
Chipset
  • Mediatek MT6572 (28 nm)
  • Mediatek MT6582 (28 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for R821T FInd Muse, Xperia E4.
SpecificationR821T FInd MuseXperia E4
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 45.5 cm2
  • 68.9 cm2
Screen format
  • 5:3 (height:width)
  • 16:9 (height:width)
Screen to body ratio
  • 58.3%
  • 67.4%
PPI /points per inch/
  • 233 PPI
  • 220 PPI
Screen protection Unknown
  • Scratch-resistant glass
Camera and Video
Camera and Video — specifications for R821T FInd Muse, Xperia E4.
SpecificationR821T FInd MuseXperia E4
Rear camera, main
  • 3.15 MP
  • Single
  • 5 MP
  • Single
Camera specs
  • 3.15 MP
  • 5 MP
  • AF
  • f/2.6
Functions Unknown
  • LED flash
  • HDR
  • panorama
Video
  • Yes
  • 720p
Front camera, selfie
  • 0.3 MP
  • Single
  • 2 MP
  • Single
Specifications
  • VGA
  • 2 MP
  • f/2.8
Performance

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

Performance — specifications for R821T FInd Muse, Xperia E4.
SpecificationR821T FInd MuseXperia E4
Processor CPU
  • Dual-core 1.2 GHz Cortex-A7
  • Quad-core 1.3 GHz Cortex-A7
Graphics processor GPU
  • Mali-400
  • Mali-400MP2
Antutu 7 score * Unknown
  • 17822
General specs
General specs — specifications for R821T FInd Muse, Xperia E4.
SpecificationR821T FInd MuseXperia E4
Release date
  • 2013
  • 2015
  • February
Colors
  • White
  • Black
  • White
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 290 EUR
  • 120 EUR
Battery life Unknown
  • Stand by time- Up to 696 h (2G) / Up to 653 h (3G) Talking time- Up to 12 h (2G) / Up to 12 h 40 min (3G) Music play - Up to 48 h
Communication and Connectivity
Communication and Connectivity — specifications for R821T FInd Muse, Xperia E4.
SpecificationR821T FInd MuseXperia E4
SIM card
  • Dual SIM (Mini-SIM
  • dual stand-by)
  • Micro-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
  • HSPA 21.1/5.76 Mbps
GPRS
  • Yes
  • Up to 107 kbps
Edge
  • Yes
  • Up to 296 kbps
Wi-Fi
  • Wi-Fi 802.11 b/g
  • hotspot
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
USB
  • microUSB 2.0
  • microUSB 2.0
Bluetooth
  • Yes
  • 4.1
  • A2DP
  • aptX
Harmful irradiation Unknown
  • SAR - 1.01 W/kg (head) 0.77 W/kg (body) SAR EU - 0.62 W/kg (head) 0.58 W/kg (body)
Music and Audio
Music and Audio — specifications for R821T FInd Muse, Xperia E4.
SpecificationR821T FInd MuseXperia E4
Radio
  • FM radio
  • FM radio
  • RDS
Others Unknown
  • Active noise cancellation with dedicated mic
Other features
Other features — specifications for R821T FInd Muse, Xperia E4.
SpecificationR821T FInd MuseXperia E4
Dop
  • Sensors Accelerometer
  • proximity
  • Sensors Accelerometer
  • proximity