LG K51S vs T-Mobile Sidekick

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

    Sidekick: 18.7 mm narrower

    K51S:
    76.7 mm
    Sidekick:
    58 mm
  • Screen diagonal

    Sidekick: 3.9 in smaller diagonal

    K51S:
    6.5 in
    Sidekick:
    2.6 in
  • Rear camera layout

    K51S:
    Quad
    Sidekick:
    Single
  • Depth

    K51S: 9.8 mm thinner

    K51S:
    8.2 mm
    Sidekick:
    18 mm
  • Height

    Sidekick: 46.2 mm shorter

    K51S:
    165.2 mm
    Sidekick:
    119 mm
  • Release year

    K51S:
    2020
    Sidekick:
    2008

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. K51S

    Height:
    165.2 mm +46.2 mm versus Sidekick
    Width:
    76.7 mm +18.7 mm versus Sidekick
    Depth:
    8.2 mm
    Weight:
    Unknown
  2. 2. Sidekick

    Height:
    119 mm
    Width:
    58 mm
    Depth:
    18 mm +9.8 mm versus K51S
    Weight:
    128 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. K51S

    Screen diagonal:
    6.5 in
    Aspect ratio (height:width):
    20:9
    Approximate rectangular screen area:
    102 cm²
  2. 2. Sidekick

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

K51S has approximately 430.1% more rectangular screen area than Sidekick.

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 K51S, Sidekick, compared at the same storage capacity.
StorageK51SSidekick
64 GB 3 GB RAM Unknown
Sidekick: Original memory entry

128 MB RAM · 64 MB ROM

Practical features

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

1. K51S

NFC:
Yes
Headphone jack:
Yes
Memory card support:
See details microSDXC (dedicated slot)

2. Sidekick

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD (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. K51S

    4000 mAh

    +2970 mAh versus Sidekick

  2. 2. Sidekick

    1030 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. K51S2. Sidekick

Everyday essentials
Everyday essentials — specifications for K51S, Sidekick.
SpecificationK51SSidekick
Dimensions (HxWxD)
  • 165.2 Х 76.7 Х 8.2 mm
  • 119 Х 58 Х 18 mm
Weight
  • 0 g
  • 128 g
Technology
  • IPS LCD
  • TFT
Screen size
  • 6.5" inch
  • 2.6" inch
Screen resolution
  • 720 x 1600 px
  • 240 x 400 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 64GB 3GB RAM
  • 128 MB RAM
  • 64 MB ROM
Memory card support
  • microSDXC (dedicated slot)
  • microSD (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 4000 mAh
  • Non-removable Li-Po
  • 1030 mAh
  • Removable Li-Ion
Operating system OS
  • Android 10.0
  • Danger 4.7
NFC
  • Yes
Unknown
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for K51S, Sidekick.
SpecificationK51SSidekick
Touchscreen
  • capacitive touchscreen
Unknown
Display colors
  • 16M
  • 65K
Screen area
  • 102.0 cm2
  • 19.2 cm2
Screen format
  • 20:9 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 80.5%
  • 27.9%
PPI /points per inch/
  • 270 PPI
  • 179 PPI
Camera and Video
Camera and Video — specifications for K51S, Sidekick.
SpecificationK51SSidekick
Rear camera, main
  • 32 MP
  • Quad
  • 1.3 MP
  • Single
Camera specs
  • 32 MP
  • (wide)
  • PDAF -5 MP
  • (ultrawide) -2 MP (macro) -2 MP (depth)
  • 1.3 MP
Functions
  • LED flash
  • panorama
  • HDR
Unknown
Video
  • 1080p@30fps
  • Yes
Front camera, selfie
  • 13 MP
  • Single
  • 0 MP,
Specifications
  • 13 MP
Unknown
Performance
Performance — specifications for K51S, Sidekick.
SpecificationK51SSidekick
Processor CPU
  • Octa-core 2.3 GHz
Unknown
General specs
General specs — specifications for K51S, Sidekick.
SpecificationK51SSidekick
Release date
  • 2020
  • February 18
  • 2008
  • July
Colors
  • Titanium
  • Pink
  • Blue
  • Black
Battery life Unknown
  • Stand by time- Up to 216 h Talking time- Up to 5 h
Communication and Connectivity
Communication and Connectivity — specifications for K51S, Sidekick.
SpecificationK51SSidekick
SIM card
  • Single SIM (Nano-SIM)Dual SIM (Nano-SIM
  • dual stand-by)
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE (unspecified)
Unknown
Speed
  • HSPA 42.2/5.76 Mbps
  • LTE-A
Unknown
GPRS
  • Yes
  • Class 10
Edge
  • Yes
  • Class 10
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi Direct
  • hotspot
  • No
GPS
  • Yes
  • with A-GPS
  • No
USB
  • 2.0
  • Type-C 1.0 reversible connector
  • miniUSB
Bluetooth
  • 5.0
  • A2DP
  • LE
  • 2.0
  • A2DP
Music and Audio
Music and Audio — specifications for K51S, Sidekick.
SpecificationK51SSidekick
Radio
  • No
  • No
Others Unknown
  • Swivel display
Other features
Other features — specifications for K51S, Sidekick.
SpecificationK51SSidekick
Dop
  • Sensors Fingerprint (rear-mounted)
  • accelerometer
  • proximity - MIL-STD-810G compliant
  • MP3/WAV/WMA audio player -MP4 player -Voice memo -Predictive text input