Nokia N81 vs Oppo R15x

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

    N81: 16 g lighter

    N81:
    140 g
    R15x:
    156 g
  • Width

    N81: 25.5 mm narrower

    N81:
    50 mm
    R15x:
    75.5 mm
  • Screen diagonal

    N81: 4 in smaller diagonal

    N81:
    2.4 in
    R15x:
    6.4 in
  • Rear camera layout

    N81:
    Single
    R15x:
    Dual
  • Depth

    R15x: 10.5 mm thinner

    N81:
    17.9 mm
    R15x:
    7.4 mm
  • Height

    N81: 56.3 mm shorter

    N81:
    102 mm
    R15x:
    158.3 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. N81

    Height:
    102 mm
    Width:
    50 mm
    Depth:
    17.9 mm +10.5 mm versus R15x
  2. 2. R15x

    Height:
    158.3 mm +56.3 mm versus N81
    Width:
    75.5 mm +25.5 mm versus N81
    Depth:
    7.4 mm

Weight

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

  1. 1. N81

    140 g

  2. 2. R15x

    156 g

    +16 g versus N81

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. N81

    Screen diagonal:
    2.4 in
    Aspect ratio (height:width):
    4:3
    Approximate rectangular screen area:
    17.8 cm²
  2. 2. R15x

    Screen diagonal:
    6.4 in
    Aspect ratio (height:width):
    19.5:9
    Approximate rectangular screen area:
    100.5 cm²

R15x has approximately 463.7% more rectangular screen area than N81.

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 N81, R15x, compared at the same storage capacity.
StorageN81R15x
128 GB Unknown 6 GB RAM
N81: Original memory entry

12 MB · 96 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. N81

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 8 GB (dedicated slot) · 2 GB included

2. R15x

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
No

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. N81

    1050 mAh

  2. 2. R15x

    3600 mAh

    +2550 mAh versus N81

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. N812. R15x

Everyday essentials
Everyday essentials — specifications for N81, R15x.
SpecificationN81R15x
Dimensions (HxWxD)
  • 102 Х 50 Х 17.9 mm
  • 158.3 Х 75.5 Х 7.4 mm
Weight
  • 140 g
  • 156 g
Technology
  • TFT
  • Super AMOLED
Screen size
  • 2.4" inch
  • 6.4" inch
Screen resolution
  • 240 x 320 px
  • 1080 x 2340 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 12 MB
  • 96 MB RAM
  • 128 GB
  • 6 GB RAM
Memory card support
  • microSD
  • up to 8 GB (dedicated slot)
  • 2 GB included
  • No
Battery Capacity is not battery life. No endurance test is implied.
  • 1050 mAh
  • Removable Li-Po
  • 3600 mAh
  • Non-removable Li-Ion
Operating system OS
  • Symbian OS 9.2
  • Series 60 v3.1 UI
  • Android 8.1 (Oreo); ColorOS 5.2
Chipset Unknown
  • Qualcomm SDM660 Snapdragon 660 (14 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for N81, R15x.
SpecificationN81R15x
Touchscreen Unknown
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 17.8 cm2
  • 101.0 cm2
Screen format
  • 4:3 (height:width)
  • 19.5:9 (height:width)
Screen to body ratio
  • 35.0%
  • 84.5%
PPI /points per inch/
  • 167 PPI
  • 402 PPI
Screen protection Unknown
  • Corning Gorilla Glass 5
Camera and Video
Camera and Video — specifications for N81, R15x.
SpecificationN81R15x
Rear camera, main
  • 2 MP
  • Single
  • 16 MP
  • Dual
Camera specs
  • 2 MP
  • 16 MP
  • f/1.7
  • 1/2.8''
  • 1.12µm
  • PDAF -2 MP
  • depth sensor
Functions
  • LED flash
  • HDR
Video
  • 320p@15fps
  • 1080p@30fps
Front camera, selfie
  • 0.3 MP
  • Single
  • 25 MP
  • Single
Specifications
  • CIF videocall camera
  • 25 MP
  • f/2.0
  • 1/2.8''
  • 0.9μm
Performance

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

Performance — specifications for N81, R15x.
SpecificationN81R15x
Processor CPU
  • 369 MHz ARM 11
  • Octa-core (4x2.0 GHz Kryo 260 & 4x1.8 GHz Kryo 260)
Graphics processor GPU Unknown
  • Adreno 512
Antutu 7 score * Unknown
  • 143726
General specs
General specs — specifications for N81, R15x.
SpecificationN81R15x
Release date
  • 2007
  • August
  • 2018
  • October
Colors
  • Cobalt blue
  • Graphite Grey
  • Nebula
  • Silver Green
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 200 EUR
  • 350 EUR
Battery life
  • Stand by time- Up to 410 h Talking time- Up to 4 h (2G) / 3 h (3G)
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for N81, R15x.
SpecificationN81R15x
SIM card
  • Mini-SIM
  • Dual SIM (Nano-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA -3G - HSDPA 850 / 1700(AWS) / 2100 / 900 -4G - LTE band 1(2100)
  • 3(1800)
  • 4(1700/2100)
  • 5(850)
  • 8(900)
  • 34(2000)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
Speed
  • Yes
  • 384 kbps
  • HSPA 42.2/5.76 Mbps
  • LTE-A (2CA) Cat6 300/50 Mbps
GPRS
  • Class 10
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11b/g with UPnP
  • Wi-Fi 802.11 а/b/g/n/ac
  • dual-band
  • WiFi Direct
  • hotspot
GPS
  • No
  • Yes
  • with A-GPS
USB
  • microUSB 2.0
  • microUSB 2.0
  • USB On-The-Go
Bluetooth
  • 2.0
  • A2DP
  • 5.0
  • A2DP
  • LE
Harmful irradiation
  • SAR - 0.73 W/kg (head) 0.60 W/kg (body) SAR EU - 0.81 W/kg (head)
Unknown
Music and Audio
Music and Audio — specifications for N81, R15x.
SpecificationN81R15x
Radio
  • Stereo FM radio
  • No
Others
  • Touch-sensitive Navi wheel
  • Active noise cancellation with dedicated mic
Other features
Other features — specifications for N81, R15x.
SpecificationN81R15x
Dop
  • MP3/AAC/MP4 player -Predictive text input -Push to talk -Voice dial/memo -Organizer
  • Sensors Fingerprint (under display)
  • accelerometer
  • gyro
  • proximity
  • compass - Fast battery charging 5V/2A 10W - Incomplete preliminary specifications