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LG Optimus 2X vs Nokia E51

Compare recorded specifications, size and practical differences.

+ Add a third phone

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

    E51: 39 g lighter

    Optimus 2X:
    139 g
    E51:
    100 g
  • Width

    E51: 17.2 mm narrower

    Optimus 2X:
    63.2 mm
    E51:
    46 mm
  • Screen diagonal

    E51: 2 in smaller diagonal

    Optimus 2X:
    4 in
    E51:
    2 in
  • Depth

    Optimus 2X: 1.1 mm thinner

    Optimus 2X:
    10.9 mm
    E51:
    12 mm
  • Height

    E51: 9.1 mm shorter

    Optimus 2X:
    123.9 mm
    E51:
    114.8 mm
  • Release year

    Optimus 2X:
    2010
    E51:
    2007

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. Optimus 2X

    Height:
    123.9 mm +9.1 mm versus E51
    Width:
    63.2 mm +17.2 mm versus E51
    Depth:
    10.9 mm
  2. 2. E51

    Height:
    114.8 mm
    Width:
    46 mm
    Depth:
    12 mm +1.1 mm versus Optimus 2X

Weight

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

  1. 1. Optimus 2X

    139 g

    +39 g versus E51

  2. 2. E51

    100 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. Optimus 2X

    Screen diagonal:
    4 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    45.5 cm²
  2. 2. E51

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

Optimus 2X has approximately 267.6% more rectangular screen area than E51.

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.

Optimus 2X: Original memory entry

8 GB · 512 MB RAM

E51: Original memory entry

130 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. Optimus 2X

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

2. E51

NFC:
Unknown
Headphone jack:
No
Memory card support:
See details microSD · up to 16 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. Optimus 2X

    1500 mAh

    +450 mAh versus E51

  2. 2. E51

    1050 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. Optimus 2X2. E51

Everyday essentials
Everyday essentials — specifications for Optimus 2X, E51.
SpecificationOptimus 2XE51
Dimensions (HxWxD)
  • 123.9 Х 63.2 Х 10.9 mm
  • 114.8 Х 46 Х 12 mm
Weight
  • 139 g
  • 100 g
Technology
  • IPS LCD
  • TFT
Screen size
  • 4" inch
  • 2" inch
Screen resolution
  • 480 x 800 px
  • 240 x 320 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 8 GB
  • 512 MB RAM
  • 130 MB
  • 96 MB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • microSD
  • up to 16 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1500 mAh
  • Removable Li-Ion
  • 1050 mAh
  • Removable Li-Ion
Operating system OS
  • Android 2.2 (Froyo)
  • 2.3
  • upgradable to 4.0 (Ice Cream Sandwich)
  • Symbian OS 9.2
  • Series 60 v3.1 UI
Chipset
  • Nvidia Tegra 2 AP20H
Unknown
Headphone jack
  • Yes
  • No
Display
Display — specifications for Optimus 2X, E51.
SpecificationOptimus 2XE51
Touchscreen
  • capacitive touchscreen
Unknown
Display colors
  • 16M
  • 16M
Screen area
  • 45.5 cm2
  • 12.4 cm2
Screen format
  • 5:3 (height:width)
  • 4:3 (height:width)
Screen to body ratio
  • 58.2%
  • 23.5%
PPI /points per inch/
  • 233 PPI
  • 200 PPI
Screen protection
  • Corning Gorilla Glass
Unknown
Camera and Video
Camera and Video — specifications for Optimus 2X, E51.
SpecificationOptimus 2XE51
Rear camera, main
  • 8 MP
  • Single
  • 2 MP
  • Single
Camera specs
  • 8 MP
  • AF
  • 2 MP
Functions
  • LED flash
Unknown
Video
  • 1080p@24fps
  • 720p@30fps
  • 320p@15fps
Front camera, selfie
  • 1.3 MP
  • Single
  • 0 MP,
Specifications
  • 1.3 MP
Unknown
Performance
Performance — specifications for Optimus 2X, E51.
SpecificationOptimus 2XE51
Processor CPU
  • Dual-core 1.0 GHz Cortex-A9
  • 369 MHz ARM 11
Graphics processor GPU
  • ULP GeForce
Unknown
General specs
General specs — specifications for Optimus 2X, E51.
SpecificationOptimus 2XE51
Release date
  • 2010
  • December
  • 2007
  • September
Colors
  • Black
  • Black
  • Silver
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 150 EUR
  • 120 EUR
Battery life
  • Stand by time- Up to 400 h Talking time- Up to 7 h 50 min
  • Stand by time- Up to 310 h Talking time- Up to 4 h 20 min
Communication and Connectivity
Communication and Connectivity — specifications for Optimus 2X, E51.
SpecificationOptimus 2XE51
SIM card
  • Mini-SIM
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
Speed
  • HSPA 7.2/5.76 Mbps
  • HSPA 3.6/0.384 Mbps
GPRS
  • Class 12
  • Class 32
Edge
  • Class 12
  • Class 32
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • DLNA
  • hotspot
  • Wi-Fi 802.11b/g
  • VoIP over WLAN
GPS
  • Yes
  • with A-GPS
  • No
USB
  • microUSB 2.0
  • miniUSB 2.0
Bluetooth
  • 2.1
  • A2DP
  • 2.0
  • A2DP
Harmful irradiation
  • SAR - 0.27 W/kg (head) 0.62 W/kg (body) SAR EU - 0.55 W/kg (head) 0.90 W/kg (body)
  • SAR - 1.38 W/kg (head) 0.75 W/kg (body) SAR EU - 1.47 W/kg (head)
Music and Audio
Music and Audio — specifications for Optimus 2X, E51.
SpecificationOptimus 2XE51
Radio
  • Stereo FM radio
  • RDS
  • FM radio
Others Unknown
  • Five-way scroll key -Downloadable themes
  • 2.5 mm audio jack
Other features
Other features — specifications for Optimus 2X, E51.
SpecificationOptimus 2XE51
Dop
  • Sensors Accelerometer
  • gyro
  • proximity
  • compass - HDMI port -DivX/Xvid/MP4/H.264/WMV player -MP3/WAV/WMA/eAAC+ player -Document editor -Organizer -Voice memo/dial/commands -Predictive text input - Also known as LG P990 Star
  • LG P990 Optimus Speed
  • Infrared port - Push to talk -WMV/RV/MP4/3GP player -MP3/WMA/WAV/RA/AAC/M4A player -Document viewer (Word
  • Excel
  • PowerPoint
  • PDF) incl. MS Office 2007 support via free update -Predictive text input -Voice command/memo -Organizer