T-Mobile Sidekick 4G vs Xiaomi Redmi 8A Dual

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

    Sidekick 4G: 26 g lighter

    Sidekick 4G:
    162 g
    Redmi 8A Dual:
    188 g
  • Width

    Sidekick 4G: 14.4 mm narrower

    Sidekick 4G:
    61 mm
    Redmi 8A Dual:
    75.4 mm
  • Screen diagonal

    Sidekick 4G: 2.72 in smaller diagonal

    Sidekick 4G:
    3.5 in
    Redmi 8A Dual:
    6.22 in
  • Rear camera layout

    Sidekick 4G:
    Single
    Redmi 8A Dual:
    Dual
  • Depth

    Redmi 8A Dual: 5.6 mm thinner

    Sidekick 4G:
    15 mm
    Redmi 8A Dual:
    9.4 mm
  • Height

    Sidekick 4G: 29.5 mm shorter

    Sidekick 4G:
    127 mm
    Redmi 8A Dual:
    156.5 mm

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 +5.6 mm versus Redmi 8A Dual
  2. 2. Redmi 8A Dual

    Height:
    156.5 mm +29.5 mm versus Sidekick 4G
    Width:
    75.4 mm +14.4 mm versus Sidekick 4G
    Depth:
    9.4 mm

Weight

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

  1. 1. Sidekick 4G

    162 g

  2. 2. Redmi 8A Dual

    188 g

    +26 g versus Sidekick 4G

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. Redmi 8A Dual

    Screen diagonal:
    6.22 in
    Aspect ratio (height:width):
    19:9
    Approximate rectangular screen area:
    96.6 cm²

Redmi 8A Dual has approximately 177% 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.

Recorded RAM for Sidekick 4G, Redmi 8A Dual, compared at the same storage capacity.
StorageSidekick 4GRedmi 8A Dual
32 GB Unknown 2 / 3 GB RAM Alternative RAM configurations
Sidekick 4G: Original memory entry

1 GB · 512 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. Sidekick 4G

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

2. Redmi 8A Dual

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSDXC (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. Redmi 8A Dual

    5000 mAh

    +3500 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. Redmi 8A Dual

Everyday essentials
Everyday essentials — specifications for Sidekick 4G, Redmi 8A Dual.
SpecificationSidekick 4GRedmi 8A Dual
Dimensions (HxWxD)
  • 127 Х 61 Х 15 mm
  • 156.5 Х 75.4 Х 9.4 mm
Weight
  • 162 g
  • 188 g
Technology
  • TFT
  • IPS LCD
Screen size
  • 3.5" inch
  • 6.22" inch
Screen resolution
  • 480 x 800 px
  • 720 x 1520 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 1 GB
  • 512 MB RAM
  • 32GB 2GB RAM
  • 32GB 3GB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • 2 GB included
  • microSDXC (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1500 mAh
  • Removable Li-Ion
  • 5000 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 2.2 (Froyo)
  • Android 9.0 (Pie); MIUI 11
Chipset
  • Hummingbird
  • Qualcomm SDM439 Snapdragon 439 (12 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Sidekick 4G, Redmi 8A Dual.
SpecificationSidekick 4GRedmi 8A Dual
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 34.9 cm2
  • 96.6 cm2
Screen format
  • 5:3 (height:width)
  • 19:9 (height:width)
Screen to body ratio
  • 45.0%
  • 81.8%
PPI /points per inch/
  • 267 PPI
  • 270 PPI
Screen protection Unknown
  • Corning Gorilla Glass 5
Camera and Video
Camera and Video — specifications for Sidekick 4G, Redmi 8A Dual.
SpecificationSidekick 4GRedmi 8A Dual
Rear camera, main
  • 3.15 MP
  • Single
  • 13 MP
  • Dual
Camera specs
  • 3.15 MP
  • AF
  • 13 MP
  • f/2.2
  • (wide)
  • 1/3.1''
  • 1.12µm
  • PDAF -2 MP
  • f/2.4
  • (depth)
Functions Unknown
  • HDR
Video
  • 480p@30fps
  • 1080p@30fps
Front camera, selfie
  • 0.3 MP
  • Single
  • 8 MP
  • Single
Specifications
  • VGA
  • 8 MP
  • f/2.0
  • 1/4''
  • 1.12µm
Performance

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

Performance — specifications for Sidekick 4G, Redmi 8A Dual.
SpecificationSidekick 4GRedmi 8A Dual
Processor CPU
  • 1.0 GHz Cortex-A8
  • Octa-core (4x1.95 GHz Cortex-A53 & 4x1.45 GHz Cortex A53)
Graphics processor GPU
  • PowerVR SGX540
  • Adreno 505
GeekBench 4 Single Core * Unknown
  • 864
GeekBench 4 Multi-Core * Unknown
  • 3669
Antutu 8 score * Unknown
  • 95326
General specs
General specs — specifications for Sidekick 4G, Redmi 8A Dual.
SpecificationSidekick 4GRedmi 8A Dual
Release date
  • 2011
  • March
  • 2020
  • February 11
Colors
  • Matte Black
  • Pearl magenta
  • Sky White
  • Sea Blue
  • Midnight Grey
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 310 EUR
  • 80 EUR
Battery life
  • Stand by time- Up to 456 h Talking time- Up to 6 h 30 min
Unknown
Body build Unknown
  • Glass front (Gorilla Glass 5)
  • plastic back
  • plastic frame
Communication and Connectivity
Communication and Connectivity — specifications for Sidekick 4G, Redmi 8A Dual.
SpecificationSidekick 4GRedmi 8A Dual
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 850 / 900 / 1900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 5(850)
  • 8(900)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA 7.2/5.76 Mbps
  • HSPA
  • LTE-A
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • DLNA
  • hotspot
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
USB
  • microUSB 2.0
  • 2.0
  • Type-C 1.0 reversible connector
  • USB On-The-Go
Bluetooth
  • 3.0
  • A2DP
  • 4.2
  • A2DP
  • LE
Harmful irradiation
  • SAR - 0.34 W/kg (head) 0.96 W/kg (body)
Unknown
Music and Audio
Music and Audio — specifications for Sidekick 4G, Redmi 8A Dual.
SpecificationSidekick 4GRedmi 8A Dual
Radio
  • Nо
  • FM radio
  • built-in antenna
Others Unknown
  • 400 nits typ. brightness
Other features
Other features — specifications for Sidekick 4G, Redmi 8A Dual.
SpecificationSidekick 4GRedmi 8A Dual
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 Accelerometer
  • proximity
  • compass - Fast battery charging 18W -Power bank/Reverse charging - Splash resistant