T-Mobile Comet vs Xiaomi Mi A1

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

    Comet: 62.9 g lighter

    Comet:
    102.1 g
    Mi A1:
    165 g
  • Width

    Comet: 19.9 mm narrower

    Comet:
    55.9 mm
    Mi A1:
    75.8 mm
  • Screen diagonal

    Comet: 2.7 in smaller diagonal

    Comet:
    2.8 in
    Mi A1:
    5.5 in
  • Chipset

    Comet:
    Qualcomm MSM7225 Snapdragon S1
    Mi A1:
    Qualcomm MSM8953 Snapdragon 625 (14 nm)
  • Rear camera layout

    Comet:
    Single
    Mi A1:
    Dual
  • Depth

    Mi A1: 5.4 mm thinner

    Comet:
    12.7 mm
    Mi A1:
    7.3 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. Comet

    Height:
    104.1 mm
    Width:
    55.9 mm
    Depth:
    12.7 mm +5.4 mm versus Mi A1
  2. 2. Mi A1

    Height:
    155.4 mm +51.3 mm versus Comet
    Width:
    75.8 mm +19.9 mm versus Comet
    Depth:
    7.3 mm

Weight

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

  1. 1. Comet

    102.1 g

  2. 2. Mi A1

    165 g

    +62.9 g versus Comet

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. Comet

    Screen diagonal:
    2.8 in
    Aspect ratio (height:width):
    4:3
    Approximate rectangular screen area:
    24.3 cm²
  2. 2. Mi A1

    Screen diagonal:
    5.5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    83.4 cm²

Mi A1 has approximately 243.5% more rectangular screen area than Comet.

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.

Mi A1: Original memory entry

64 GB · 512GB 4GB

Practical features

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

1. Comet

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

2. Mi A1

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 128 GB (uses SIM 2 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. Comet

    1200 mAh

  2. 2. Mi A1

    3080 mAh

    +1880 mAh versus Comet

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. Comet2. Mi A1

Everyday essentials
Everyday essentials — specifications for Comet, Mi A1.
SpecificationCometMi A1
Dimensions (HxWxD)
  • 104.1 Х 55.9 Х 12.7 mm
  • 155.4 Х 75.8 Х 7.3 mm
Weight
  • 102.1 g
  • 165 g
Technology
  • TFT
  • LTPS IPS LCD
Screen size
  • 2.8" inch
  • 5.5" inch
Screen resolution
  • 240 x 320 px
  • 1080 x 1920 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded. Unknown
  • 64 GB
  • 512GB 4GB
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • 2 GB included
  • microSD
  • up to 128 GB (uses SIM 2 slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1200 mAh
  • Removable Li-Ion
  • 3080 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 2.2 (Froyo)
  • Android 7.1.2 (Nougat)
  • upgradable to Android 9.0 (Pie); Android One
Chipset
  • Qualcomm MSM7225 Snapdragon S1
  • Qualcomm MSM8953 Snapdragon 625 (14 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Comet, Mi A1.
SpecificationCometMi A1
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 256K
  • 16M
Screen area
  • 24.3 cm2
  • 82.6 cm2
Screen format
  • 4:3 (height:width)
  • 16:9 (height:width)
Screen to body ratio
  • 41.7%
  • 70.1%
PPI /points per inch/
  • 143 PPI
  • 403 PPI
Screen protection Unknown
  • Corning Gorilla Glass 3
Camera and Video
Camera and Video — specifications for Comet, Mi A1.
SpecificationCometMi A1
Rear camera, main
  • 3.15 MP
  • Single
  • 12 MP
  • Dual
Camera specs
  • 3.15 MP
  • 12 MP
  • f/2.2
  • 26mm (wide)
  • 1.25µm
  • PDAF -12 MP
  • f/2.6
  • 50mm (telephoto)
  • 1.0µm
  • AF
  • 2x optical zoom
Functions Unknown
  • Dual-LED dual-tone flash
  • HDR
  • panorama
Video
  • CIF
  • 1080p@30fps
Front camera, selfie
  • 0 MP,
  • 5 MP
  • Single
Specifications Unknown
  • 5 MP
Performance

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

Performance — specifications for Comet, Mi A1.
SpecificationCometMi A1
Processor CPU
  • 528 MHz ARM 11
  • Octa-core 2.0 GHz Cortex-A53
Graphics processor GPU
  • No
  • Adreno 506
Antutu 7 score * Unknown
  • 78560
GeekBench 4 Single Core * Unknown
  • 859
GeekBench 4 Multi-Core * Unknown
  • 4171
Antutu 8 score * Unknown
  • 96807
GeekBench 4 Battery * Unknown
  • 3415
GeekBench 5 Single Core * Unknown
  • 169
GeekBench 5 Multi-Core * Unknown
  • 1000
General specs
General specs — specifications for Comet, Mi A1.
SpecificationCometMi A1
Release date
  • 2010
  • November
  • 2017
  • September
Colors
  • Black
  • Black
  • Gold
  • Rose Gold
  • Red
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 150 EUR
  • 170 EUR
Battery life
  • Stand by time- Up to 288 h Talking time- Up to 9 h
Unknown
Body build Unknown
  • Front glass
  • aluminum frame
  • back
Communication and Connectivity
Communication and Connectivity — specifications for Comet, Mi A1.
SpecificationCometMi A1
SIM card
  • Mini-SIM
  • Hybrid 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)
  • 7(2600)
  • 8(900)
  • 20(800)
  • 38(2600)
  • 40(2300)
Speed
  • HSPA 7.2/0.384 Mbps
  • HSPA 42.2/5.76 Mbps
  • LTE-A (2CA) Cat6 300/50 Mbps
GPRS
  • Class 10
  • Yes
Edge
  • Class 10
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • hotspot
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • WiFi 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
Bluetooth
  • 2.0
  • A2DP
  • 4.2
  • A2DP
  • LE
Music and Audio
Music and Audio — specifications for Comet, Mi A1.
SpecificationCometMi A1
Radio
  • FM radio
  • FM radio
Others Unknown
  • Active noise cancellation with dedicated mic
Other features
Other features — specifications for Comet, Mi A1.
SpecificationCometMi A1
Dop
  • Sensors Accelerometer MP3/WMA/eAAC+ player -MP4/H.264 player -Organizer -Photo viewer/editor -Voice memo/dial/commands -Predictive text input (Swype) For T-Mobile
  • Sensors Fingerprint (rear-mounted)
  • accelerometer
  • gyro
  • proximity
  • Infrared port - Charging 5V/2A 10W - For Europe
  • Asia Pacific
  • Middle East & Africa
  • LATAM. Also known as Xiaomi Mi 5X in China.