Sony Xperia U 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.

  • Weight

    Xperia U: 18 g lighter

    Xperia U:
    110 g
    Sidekick:
    128 g
  • Width

    Xperia U: 4 mm narrower

    Xperia U:
    54 mm
    Sidekick:
    58 mm
  • Screen diagonal

    Sidekick: 0.9 in smaller diagonal

    Xperia U:
    3.5 in
    Sidekick:
    2.6 in
  • Depth

    Xperia U: 6 mm thinner

    Xperia U:
    12 mm
    Sidekick:
    18 mm
  • Height

    Xperia U: 7 mm shorter

    Xperia U:
    112 mm
    Sidekick:
    119 mm
  • Release year

    Xperia U:
    2012
    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. Xperia U

    Height:
    112 mm
    Width:
    54 mm
    Depth:
    12 mm
  2. 2. Sidekick

    Height:
    119 mm +7 mm versus Xperia U
    Width:
    58 mm +4 mm versus Xperia U
    Depth:
    18 mm +6 mm versus Xperia U

Weight

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

  1. 1. Xperia U

    110 g

  2. 2. Sidekick

    128 g

    +18 g versus Xperia U

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. Xperia U

    Screen diagonal:
    3.5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    33.8 cm²
  2. 2. Sidekick

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

Xperia U has approximately 75.5% 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.

No unambiguous storage/RAM pairings are recorded. See the original specifications below.

Xperia U: Original memory entry

8 GB (4 GB user available) · 512 MB RAM

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. Xperia U

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

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. Xperia U

    1320 mAh

    +290 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. Xperia U2. Sidekick

Everyday essentials
Everyday essentials — specifications for Xperia U, Sidekick.
SpecificationXperia USidekick
Dimensions (HxWxD)
  • 112 Х 54 Х 12 mm
  • 119 Х 58 Х 18 mm
Weight
  • 110 g
  • 128 g
Technology
  • TFT
  • TFT
Screen size
  • 3.5" inch
  • 2.6" inch
Screen resolution
  • 480 x 854 px
  • 240 x 400 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 8 GB (4 GB user available)
  • 512 MB RAM
  • 128 MB RAM
  • 64 MB ROM
Memory card support
  • No
  • microSD (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1320 mAh
  • Removable Li-Ion
  • 1030 mAh
  • Removable Li-Ion
Operating system OS
  • Android 2.3 (Gingerbread)
  • upgradable to 4.0 (Ice Cream Sandwich)
  • Danger 4.7
Chipset
  • NovaThor U8500
Unknown
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Xperia U, Sidekick.
SpecificationXperia USidekick
Touchscreen
  • capacitive touchscreen
Unknown
Display colors
  • 16M
  • 65K
Screen area
  • 33.8 cm2
  • 19.2 cm2
Screen format
  • 16:9 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 55.8%
  • 27.9%
PPI /points per inch/
  • 280 PPI
  • 179 PPI
Screen protection
  • Scratch-resistant glass
Unknown
Camera and Video
Camera and Video — specifications for Xperia U, Sidekick.
SpecificationXperia USidekick
Rear camera, main
  • 5 MP
  • Single
  • 1.3 MP
  • Single
Camera specs
  • 5 MP
  • AF
  • 1.3 MP
Functions
  • LED flash
  • panorama
Unknown
Video
  • 720p@30fps
  • Yes
Front camera, selfie
  • 0.3 MP
  • Single
  • 0 MP,
Specifications
  • VGA
Unknown
Performance

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

Performance — specifications for Xperia U, Sidekick.
SpecificationXperia USidekick
Processor CPU
  • Dual-core 1.0 GHz Cortex-A9
Unknown
Graphics processor GPU
  • Mali-400
Unknown
Antutu 7 score *
  • 9020
Unknown
GeekBench 4 Single Core *
  • 275
Unknown
GeekBench 4 Multi-Core *
  • 493
Unknown
General specs
General specs — specifications for Xperia U, Sidekick.
SpecificationXperia USidekick
Release date
  • 2012
  • February
  • 2008
  • July
Colors
  • Black
  • White/ exchangeable bottom caps in white
  • Pink
  • Yellow
  • Black
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 140 EUR
Unknown
Battery life
  • Stand by time- Up to 260 h (2G) / Up to 472 h (3G) Talking time- Up to 6 h 36 min (2G) / Up to 5 h 36 min (3G) Music play - Up to 45 h
  • Stand by time- Up to 216 h Talking time- Up to 5 h
Communication and Connectivity
Communication and Connectivity — specifications for Xperia U, Sidekick.
SpecificationXperia USidekick
SIM card
  • Mini-SIM
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
Unknown
Speed
  • HSPA 14.4/5.76 Mbps
Unknown
GPRS
  • Up to 107 kbps
  • Class 10
Edge
  • Up to 296 kbps
  • Class 10
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • hotspot
  • DLNA
  • No
GPS
  • Yes
  • with A-GPS
  • No
USB
  • microUSB 2.0
  • USB Host
  • miniUSB
Bluetooth
  • 2.1
  • A2DP
  • EDR
  • 2.0
  • A2DP
Harmful irradiation
  • SAR - 1.09 W/kg (head) 0.93 W/kg (body) SAR EU - 1.62 W/kg (head)
Unknown
Music and Audio
Music and Audio — specifications for Xperia U, Sidekick.
SpecificationXperia USidekick
Radio
  • Stereo FM radio
  • RDS
  • No
Others
  • Sony 3D surround sound audio technology -Active noise cancellation with dedicated mic
  • Swivel display
Other features
Other features — specifications for Xperia U, Sidekick.
SpecificationXperia USidekick
Dop
  • Sensors Accelerometer
  • proximity
  • compass - Previously known as Sony Ericsson ST25i Kumquat
  • MP3/WAV/WMA audio player -MP4 player -Voice memo -Predictive text input