Celkon A99 vs T-Mobile Sidekick LX

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

    A99: 42 g lighter

    A99:
    120 g
    Sidekick LX:
    162 g
  • Width

    Sidekick LX: 4 mm narrower

    A99:
    64 mm
    Sidekick LX:
    60 mm
  • Screen diagonal

    Sidekick LX: 1 in smaller diagonal

    A99:
    4 in
    Sidekick LX:
    3 in
  • Depth

    A99: 10.7 mm thinner

    A99:
    11.3 mm
    Sidekick LX:
    22 mm
  • Height

    A99: 8.1 mm shorter

    A99:
    121.4 mm
    Sidekick LX:
    129.5 mm
  • Release year

    A99:
    2012
    Sidekick LX:
    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. A99

    Height:
    121.4 mm
    Width:
    64 mm +4 mm versus Sidekick LX
    Depth:
    11.3 mm
  2. 2. Sidekick LX

    Height:
    129.5 mm +8.1 mm versus A99
    Width:
    60 mm
    Depth:
    22 mm +10.7 mm versus A99

Weight

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

  1. 1. A99

    120 g

  2. 2. Sidekick LX

    162 g

    +42 g versus A99

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. A99

    Screen diagonal:
    4 in
    Aspect ratio (height:width):
    3:2
    Approximate rectangular screen area:
    47.6 cm²
  2. 2. Sidekick LX

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

A99 has approximately 86% more rectangular screen area than Sidekick LX.

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.

Sidekick LX: Original memory entry

64 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. A99

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

2. Sidekick LX

NFC:
Unknown
Headphone jack:
No
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. A99

    1200 mAh

  2. 2. Sidekick LX

    1540 mAh

    +340 mAh versus A99

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. A992. Sidekick LX

Everyday essentials
Everyday essentials — specifications for A99, Sidekick LX.
SpecificationA99Sidekick LX
Dimensions (HxWxD)
  • 121.4 Х 64 Х 11.3 mm
  • 129.5 Х 60 Х 22 mm
Weight
  • 120 g
  • 162 g
Technology
  • TFT
  • TFT
Screen size
  • 4" inch
  • 3" inch
Screen resolution
  • 320 x 480 px
  • 240 x 400 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded. Unknown
  • 64 MB RAM
  • 64 MB ROM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • microSD (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1200 mAh
  • Li-Ion
  • 1540 mAh
  • Removable Li-Ion
Operating system OS
  • Android 2.3.5 (Gingerbread)
  • Danger OS
Headphone jack
  • Yes
  • No
Display
Display — specifications for A99, Sidekick LX.
SpecificationA99Sidekick LX
Touchscreen
  • capacitive touchscreen
Unknown
Display colors
  • 256K
  • 65K
Screen area
  • 47.6 cm2
  • 25.6 cm2
Screen format
  • 3:2 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 61.3%
  • 33.0%
PPI /points per inch/
  • 144 PPI
  • 155 PPI
Camera and Video
Camera and Video — specifications for A99, Sidekick LX.
SpecificationA99Sidekick LX
Rear camera, main
  • 3.15 MP
  • Single
  • 1.3 MP
  • Single
Camera specs
  • 3.15 MP
  • 1.3 MP
Video
  • Yes
  • Yes
Front camera, selfie
  • 0.3 MP
  • Single
  • 0 MP,
Performance
Performance — specifications for A99, Sidekick LX.
SpecificationA99Sidekick LX
Processor CPU
  • 650 MHz
Unknown
General specs
General specs — specifications for A99, Sidekick LX.
SpecificationA99Sidekick LX
Release date
  • 2012
  • 2007
  • September
Colors
  • Black
  • Black
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 160 EUR
Battery life
  • Stand by time- Up to 400 h Talking time- Up to 3 h
  • Stand by time- Up to 96 h Talking time- Up to 6 h 50 min
Communication and Connectivity
Communication and Connectivity — specifications for A99, Sidekick LX.
SpecificationA99Sidekick LX
SIM card
  • Dual SIM (Mini-SIM)
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
Unknown
Speed
  • HSPA
Unknown
GPRS
  • Yes
  • Class 10
Edge
  • Yes
  • Class 10
Wi-Fi
  • Wi-Fi 802.11 b/g
  • hotspot
  • No
GPS
  • Yes
  • with A-GPS
  • No
USB
  • microUSB 2.0
  • Proprietary
Bluetooth
  • 2.1
  • A2DP
  • 2.0
Harmful irradiation Unknown
  • SAR - 0.40 W/kg (head) 0.46 W/kg (body)
Music and Audio
Music and Audio — specifications for A99, Sidekick LX.
SpecificationA99Sidekick LX
Radio
  • Stereo FM radio
  • RDS
  • recordin
  • No
Other features
Other features — specifications for A99, Sidekick LX.
SpecificationA99Sidekick LX
Dop
  • Sensors Accelerometer
  • proximity
  • compass - MP3/WAV/eAAC player -MP4/H.264 player -Document viewer -Organizer -Voice memo/dial -Predictive text input
  • MP3/WMA audio player -MP4 player -Voice memo