T-Mobile Sidekick 4G vs YU Ace

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 4G: 9.5 mm narrower

    Sidekick 4G:
    61 mm
    Ace:
    70.5 mm
  • Screen diagonal

    Sidekick 4G: 1.95 in smaller diagonal

    Sidekick 4G:
    3.5 in
    Ace:
    5.45 in
  • Depth

    Ace: 5.4 mm thinner

    Sidekick 4G:
    15 mm
    Ace:
    9.6 mm
  • Height

    Sidekick 4G: 21 mm shorter

    Sidekick 4G:
    127 mm
    Ace:
    148 mm
  • Release year

    Sidekick 4G:
    2011
    Ace:
    2018

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. Sidekick 4G

    Height:
    127 mm
    Width:
    61 mm
    Depth:
    15 mm +5.4 mm versus Ace
    Weight:
    162 g
  2. 2. Ace

    Height:
    148 mm +21 mm versus Sidekick 4G
    Width:
    70.5 mm +9.5 mm versus Sidekick 4G
    Depth:
    9.6 mm
    Weight:
    Unknown

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. Sidekick 4G

    Screen diagonal:
    3.5 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    34.9 cm²
  2. 2. Ace

    Screen diagonal:
    5.45 in
    Aspect ratio (height:width):
    18:9
    Approximate rectangular screen area:
    76.7 cm²

Ace has approximately 119.8% more rectangular screen area than Sidekick 4G.

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 4G: Original memory entry

1 GB · 512 MB RAM

Ace: Original memory entry

32 GB · 3 RAM 16 GB · 2 GB 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. Sidekick 4G

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB (dedicated slot) · 2 GB included

2. Ace

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 128 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. Sidekick 4G

    1500 mAh

  2. 2. Ace

    4000 mAh

    +2500 mAh versus Sidekick 4G

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. Sidekick 4G2. Ace

Everyday essentials
Everyday essentials — specifications for Sidekick 4G, Ace.
SpecificationSidekick 4GAce
Dimensions (HxWxD)
  • 127 Х 61 Х 15 mm
  • 148 Х 70.5 Х 9.6 mm
Weight
  • 162 g
  • 0 g
Technology
  • TFT
  • IPS LCD
Screen size
  • 3.5" inch
  • 5.45" inch
Screen resolution
  • 480 x 800 px
  • 720 x 1440 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 1 GB
  • 512 MB RAM
  • 32 GB
  • 3 RAM 16 GB
  • 2 GB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • 2 GB included
  • microSD
  • up to 128 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1500 mAh
  • Removable Li-Ion
  • 4000 mAh
  • Removable Li-Po
Operating system OS
  • Android 2.2 (Froyo)
  • Android 8.0 (Oreo)
Chipset
  • Hummingbird
  • Mediatek MT6739WW (28 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Sidekick 4G, Ace.
SpecificationSidekick 4GAce
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 34.9 cm2
  • 76.7 cm2
Screen format
  • 5:3 (height:width)
  • 18:9 (height:width)
Screen to body ratio
  • 45.0%
  • 73.5%
PPI /points per inch/
  • 267 PPI
  • 295 PPI
Camera and Video
Camera and Video — specifications for Sidekick 4G, Ace.
SpecificationSidekick 4GAce
Rear camera, main
  • 3.15 MP
  • Single
  • 13 MP
  • Single
Camera specs
  • 3.15 MP
  • AF
  • 13 MP
  • AF
Functions Unknown
  • LED flash
Video
  • 480p@30fps
  • 720p@30fps
Front camera, selfie
  • 0.3 MP
  • Single
  • 5 MP
  • Single
Specifications
  • VGA
  • 5 MP
Performance

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

Performance — specifications for Sidekick 4G, Ace.
SpecificationSidekick 4GAce
Processor CPU
  • 1.0 GHz Cortex-A8
  • Quad-core 1.5 GHz Cortex-A53
Graphics processor GPU
  • PowerVR SGX540
  • PowerVR GE8100
Antutu 7 score * Unknown
  • 31252
General specs
General specs — specifications for Sidekick 4G, Ace.
SpecificationSidekick 4GAce
Release date
  • 2011
  • March
  • 2018
  • August
Colors
  • Matte Black
  • Pearl magenta
  • Charcoal Grey
  • Elektric Blue
  • Rose Gold
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 310 EUR
  • 6000 INR
Battery life
  • Stand by time- Up to 456 h Talking time- Up to 6 h 30 min
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for Sidekick 4G, Ace.
SpecificationSidekick 4GAce
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 -3G - HSDPA 900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 5(850)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA 7.2/5.76 Mbps
  • HSPA 21.1/5.76 Mbps
  • LTE Cat4 150/50 Mbps
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • DLNA
  • hotspot
  • Wi-Fi 802.11 b/g/n
  • WiFi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
USB
  • microUSB 2.0
  • microUSB 2.0
  • USB On-The-Go
Bluetooth
  • 3.0
  • A2DP
  • 4.1
  • A2DP
Harmful irradiation
  • SAR - 0.34 W/kg (head) 0.96 W/kg (body)
Unknown
Music and Audio
Music and Audio — specifications for Sidekick 4G, Ace.
SpecificationSidekick 4GAce
Radio
  • Nо
  • FM radio
Other features
Other features — specifications for Sidekick 4G, Ace.
SpecificationSidekick 4GAce
Dop
  • Sensors Accelerometer
  • proximity - T-Mobile TV -MP4/H.264 player -MP3/WAV/eAAC+ player -Organizer -ThinkFree Office document editor
  • PDF viewer -Voice memo -Predictive text input - Optical trackpad - Also known as T-Mobile T839 Sidekick 4G
  • Sensors Fingerprint (rear-mounted)
  • accelerometer
  • proximity - Fast battery charging 10W - For India