HTC U Ultra vs Xiaomi Redmi 8A Dual

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

    U Ultra: 18 g lighter

    U Ultra:
    170 g
    Redmi 8A Dual:
    188 g
  • Width

    Redmi 8A Dual: 4.4 mm narrower

    U Ultra:
    79.8 mm
    Redmi 8A Dual:
    75.4 mm
  • Screen diagonal

    U Ultra: 0.52 in smaller diagonal

    U Ultra:
    5.7 in
    Redmi 8A Dual:
    6.22 in
  • Chipset

    U Ultra:
    Qualcomm MSM8996 Snapdragon 821 (14 nm)
    Redmi 8A Dual:
    Qualcomm SDM439 Snapdragon 439 (12 nm)
  • Rear camera layout

    U Ultra:
    Single
    Redmi 8A Dual:
    Dual
  • Depth

    U Ultra: 1.4 mm thinner

    U Ultra:
    8 mm
    Redmi 8A Dual:
    9.4 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. U Ultra

    Height:
    162.4 mm +5.9 mm versus Redmi 8A Dual
    Width:
    79.8 mm +4.4 mm versus Redmi 8A Dual
    Depth:
    8 mm
  2. 2. Redmi 8A Dual

    Height:
    156.5 mm
    Width:
    75.4 mm
    Depth:
    9.4 mm +1.4 mm versus U Ultra

Weight

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

  1. 1. U Ultra

    170 g

  2. 2. Redmi 8A Dual

    188 g

    +18 g versus U Ultra

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. U Ultra

    Screen diagonal:
    5.7 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    89.6 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 7.8% more rectangular screen area than U Ultra.

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 U Ultra, Redmi 8A Dual, compared at the same storage capacity.
StorageU UltraRedmi 8A Dual
32 GB Unknown 2 / 3 GB RAM Alternative RAM configurations
U Ultra: Original memory entry

64/128 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. U Ultra

NFC:
Yes
Headphone jack:
No
Memory card support:
See details microSD · up to 512 GB (uses SIM 2 slot)

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. U Ultra

    3000 mAh

  2. 2. Redmi 8A Dual

    5000 mAh

    +2000 mAh versus U Ultra

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. U Ultra2. Redmi 8A Dual

Everyday essentials
Everyday essentials — specifications for U Ultra, Redmi 8A Dual.
SpecificationU UltraRedmi 8A Dual
Dimensions (HxWxD)
  • 162.4 Х 79.8 Х 8 mm
  • 156.5 Х 75.4 Х 9.4 mm
Weight
  • 170 g
  • 188 g
Technology
  • Super LCD5
  • IPS LCD
Screen size
  • 5.7" inch
  • 6.22" inch
Screen resolution
  • 1440 x 2560 px
  • 720 x 1520 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 64/128 GB
  • 512GB 4GB
  • 32GB 2GB RAM
  • 32GB 3GB RAM
Memory card support
  • microSD
  • up to 512 GB (uses SIM 2 slot)
  • microSDXC (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 3000 mAh
  • Non-removable Li-Ion
  • 5000 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 7.0 (Nougat)
  • upgradable to Android 8.0 (Oreo)
  • Android 9.0 (Pie); MIUI 11
Chipset
  • Qualcomm MSM8996 Snapdragon 821 (14 nm)
  • Qualcomm SDM439 Snapdragon 439 (12 nm)
NFC
  • Yes
Unknown
Headphone jack
  • No
  • Yes
Display
Display — specifications for U Ultra, Redmi 8A Dual.
SpecificationU UltraRedmi 8A Dual
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 90.3 cm2
  • 96.6 cm2
Screen format
  • 16:9 (height:width)
  • 19:9 (height:width)
Screen to body ratio
  • 69.7%
  • 81.8%
PPI /points per inch/
  • 513 PPI
  • 270 PPI
Screen protection
  • Corning Gorilla Glass 5 (64 GB version)Sapphire crystal glass (128 GB version)
  • Corning Gorilla Glass 5
Camera and Video
Camera and Video — specifications for U Ultra, Redmi 8A Dual.
SpecificationU UltraRedmi 8A Dual
Rear camera, main
  • 12 MP
  • Single
  • 13 MP
  • Dual
Camera specs
  • 12 MP
  • f/1.8
  • 26mm (wide)
  • 1/2.3''
  • 1.55µm
  • OIS
  • PDAF & laser AF
  • 13 MP
  • f/2.2
  • (wide)
  • 1/3.1''
  • 1.12µm
  • PDAF -2 MP
  • f/2.4
  • (depth)
Functions
  • Auto-HDR
  • HDR
Video
  • 1080p@30fps
  • 1080p@30fps
Front camera, selfie
  • 16 MP
  • Single
  • 8 MP
  • Single
Specifications
  • 16 MP
  • 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 U Ultra, Redmi 8A Dual.
SpecificationU UltraRedmi 8A Dual
Processor CPU
  • Quad-core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo)
  • Octa-core (4x1.95 GHz Cortex-A53 & 4x1.45 GHz Cortex A53)
Graphics processor GPU
  • Adreno 530
  • Adreno 505
Antutu 7 score *
  • 168385
Unknown
GeekBench 4 Single Core *
  • 1662
  • 864
GeekBench 4 Multi-Core *
  • 3920
  • 3669
GeekBench 4 RenderScript *
  • 7174
Unknown
Antutu 8 score * Unknown
  • 95326
GeekBench 5 Single Core *
  • 302
Unknown
GeekBench 5 Multi-Core *
  • 795
Unknown
General specs
General specs — specifications for U Ultra, Redmi 8A Dual.
SpecificationU UltraRedmi 8A Dual
Release date
  • 2017
  • January
  • 2020
  • February 11
Colors
  • Brilliant Black
  • Cosmetic Pink
  • Ice White
  • Sapphire Blue
  • Sky White
  • Sea Blue
  • Midnight Grey
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 250 EUR
  • 80 EUR
Battery life
  • Stand by time- Up to 312 h (3G) Talking time- Up to 26 h (3G)
Unknown
Body build
  • Front/back glass
  • aluminum frame
  • Glass front (Gorilla Glass 5)
  • plastic back
  • plastic frame
Communication and Connectivity
Communication and Connectivity — specifications for U Ultra, Redmi 8A Dual.
SpecificationU UltraRedmi 8A Dual
SIM card
  • Hybrid Dual SIM (Nano-SIM
  • dual stand-by)
  • Dual SIM (Nano-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 -4G - LTE band 1(2100)
  • 2(1900)
  • 3(1800)
  • 4(1700/2100)
  • 5(850)
  • 7(2600)
  • 8(900)
  • 12(700)
  • 17(700)
  • 20(800)
  • 28(700)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
  • 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 42.2/5.76 Mbps
  • LTE-A (3CA) Cat11 600/50 Mbps
  • HSPA
  • LTE-A
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • WiFi Direct
  • DLNA
  • hotspot
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
USB
  • 3.1
  • Type-C 1.0 reversible connector
  • 2.0
  • Type-C 1.0 reversible connector
  • USB On-The-Go
Bluetooth
  • 4.2
  • A2DP
  • LE
  • 4.2
  • A2DP
  • LE
Music and Audio
Music and Audio — specifications for U Ultra, Redmi 8A Dual.
SpecificationU UltraRedmi 8A Dual
Radio
  • No
  • FM radio
  • built-in antenna
Others
  • Secondary display
  • 160 x 1040 pixels
  • 2 inches
  • 24-bit/192kHz audio -Active noise cancellation with dedicated mic
  • 400 nits typ. brightness
Other features
Other features — specifications for U Ultra, Redmi 8A Dual.
SpecificationU UltraRedmi 8A Dual
Dop
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass - Fast battery charging (Quick Charge 3.0) - Also known as HTC Ocean Note
  • Sensors Accelerometer
  • proximity
  • compass - Fast battery charging 18W -Power bank/Reverse charging - Splash resistant