HTC U Ultra vs Xiaomi Redmi K20 Pro Premium

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.

  • Display technology

    OLED versus LCD

    U Ultra:
    LCD
    Redmi K20 Pro Premium:
    OLED
  • Weight

    U Ultra: 21 g lighter

    U Ultra:
    170 g
    Redmi K20 Pro Premium:
    191 g
  • Width

    Redmi K20 Pro Premium: 5.5 mm narrower

    U Ultra:
    79.8 mm
    Redmi K20 Pro Premium:
    74.3 mm
  • Screen diagonal

    U Ultra: 0.69 in smaller diagonal

    U Ultra:
    5.7 in
    Redmi K20 Pro Premium:
    6.39 in
  • Chipset

    U Ultra:
    Qualcomm MSM8996 Snapdragon 821 (14 nm)
    Redmi K20 Pro Premium:
    Qualcomm SDM855 Snapdragon 855+ (7 nm)
  • Rear camera layout

    U Ultra:
    Single
    Redmi K20 Pro Premium:
    Triple

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 +5.7 mm versus Redmi K20 Pro Premium
    Width:
    79.8 mm +5.5 mm versus Redmi K20 Pro Premium
    Depth:
    8 mm
  2. 2. Redmi K20 Pro Premium

    Height:
    156.7 mm
    Width:
    74.3 mm
    Depth:
    8.8 mm +0.8 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 K20 Pro Premium

    191 g

    +21 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 K20 Pro Premium

    Screen diagonal:
    6.39 in
    Aspect ratio (height:width):
    19.5:9
    Approximate rectangular screen area:
    100.2 cm²

Redmi K20 Pro Premium has approximately 11.9% 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.

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

U Ultra: Original memory entry

64/128 GB · 512GB 4GB

Redmi K20 Pro Premium: Original memory entry

128GB 8GB RAM · 512GB 8GB RAM · 512GB 12GB RAM · UFS2.1

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 K20 Pro Premium

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

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 K20 Pro Premium

    4000 mAh

    +1000 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 K20 Pro Premium

Everyday essentials
Everyday essentials — specifications for U Ultra, Redmi K20 Pro Premium.
SpecificationU UltraRedmi K20 Pro Premium
Dimensions (HxWxD)
  • 162.4 Х 79.8 Х 8 mm
  • 156.7 Х 74.3 Х 8.8 mm
Weight
  • 170 g
  • 191 g
Technology
  • Super LCD5
  • Super AMOLED
Screen size
  • 5.7" inch
  • 6.39" inch
Screen resolution
  • 1440 x 2560 px
  • 1080 x 2340 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 64/128 GB
  • 512GB 4GB
  • 128GB 8GB RAM
  • 512GB 8GB RAM
  • 512GB 12GB RAM
  • UFS2.1
Memory card support
  • microSD
  • up to 512 GB (uses SIM 2 slot)
  • No
Battery Capacity is not battery life. No endurance test is implied.
  • 3000 mAh
  • Non-removable Li-Ion
  • 4000 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 7.0 (Nougat)
  • upgradable to Android 8.0 (Oreo)
  • Android 10; MIUI 11
Chipset
  • Qualcomm MSM8996 Snapdragon 821 (14 nm)
  • Qualcomm SDM855 Snapdragon 855+ (7 nm)
NFC
  • Yes
  • Yes
Headphone jack
  • No
  • Yes
Display
Display — specifications for U Ultra, Redmi K20 Pro Premium.
SpecificationU UltraRedmi K20 Pro Premium
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 90.3 cm2
  • 100.2 cm2
Screen format
  • 16:9 (height:width)
  • 19.5:9 (height:width)
Screen to body ratio
  • 69.7%
  • 86.1%
PPI /points per inch/
  • 513 PPI
  • 403 PPI
Screen protection
  • Corning Gorilla Glass 5 (64 GB version)Sapphire crystal glass (128 GB version)
  • Corning Gorilla Glass 5
Camera and Video

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

Camera and Video — specifications for U Ultra, Redmi K20 Pro Premium.
SpecificationU UltraRedmi K20 Pro Premium
Rear camera, main
  • 12 MP
  • Single
  • 48 MP
  • Triple
Camera specs
  • 12 MP
  • f/1.8
  • 26mm (wide)
  • 1/2.3''
  • 1.55µm
  • OIS
  • PDAF & laser AF
  • 48 MP
  • f/1.8
  • 26mm (wide)
  • 1/2''
  • 0.8µm
  • PDAF
  • Laser AF -8 MP
  • f/2.4
  • 53mm (telephoto)
  • 1/4''
  • 1.12µm
  • laser AF
  • 2x optical zoom -13 MP
  • 12mm (ultrawide)
  • 1/3''
Functions
  • Auto-HDR
  • HDR
Video
  • 1080p@30fps
  • 1080p@30fps
Front camera, selfie
  • 16 MP
  • Single
  • 20 MP
  • Single
Specifications
  • 16 MP
  • Motorized pop-up 20 MP
  • f/2.2
  • 0.8µm
DxOMark Main Score * Unknown
  • 102
DxOMark Photo * Unknown
  • 108
DxOMark Video * Unknown
  • 89
Performance

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

Performance — specifications for U Ultra, Redmi K20 Pro Premium.
SpecificationU UltraRedmi K20 Pro Premium
Processor CPU
  • Quad-core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo)
  • Octa-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.8 GHz Kryo 485)
Graphics processor GPU
  • Adreno 530
  • Adreno 640 (700 MHz)
Antutu 7 score *
  • 168385
  • 459852
GeekBench 4 Single Core *
  • 1662
Unknown
GeekBench 4 Multi-Core *
  • 3920
Unknown
GeekBench 4 RenderScript *
  • 7174
Unknown
Antutu 8 score * Unknown
  • 462955
GeekBench 5 Single Core *
  • 302
  • 692
GeekBench 5 Multi-Core *
  • 795
  • 2542
General specs
General specs — specifications for U Ultra, Redmi K20 Pro Premium.
SpecificationU UltraRedmi K20 Pro Premium
Release date
  • 2017
  • January
  • 2019
  • September
Colors
  • Brilliant Black
  • Cosmetic Pink
  • Ice White
  • Sapphire Blue
  • Carbon black
  • Flame red
  • Glacier blue
  • Summer Honey
  • Pearl White
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 250 EUR
  • 450 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
  • Front/back glass (Gorilla Glass 5)
  • aluminum frame
Communication and Connectivity
Communication and Connectivity — specifications for U Ultra, Redmi K20 Pro Premium.
SpecificationU UltraRedmi K20 Pro Premium
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 (unspecified)
Speed
  • HSPA 42.2/5.76 Mbps
  • LTE-A (3CA) Cat11 600/50 Mbps
  • HSPA 42.2/5.76 Mbps
  • 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 a/b/g/n/ac
  • dual-band
  • Wi-Fi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
  • Yes
  • with dual-band A-GPS
  • GLONASS
  • BDS
  • GALILEO
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
  • 5.0
  • A2DP
  • LE
  • aptX HD
Music and Audio
Music and Audio — specifications for U Ultra, Redmi K20 Pro Premium.
SpecificationU UltraRedmi K20 Pro Premium
Radio
  • No
  • Yes
Others
  • Secondary display
  • 160 x 1040 pixels
  • 2 inches
  • 24-bit/192kHz audio -Active noise cancellation with dedicated mic
  • DCI-P3 100% -HDR10
  • 24-bit/192kHz audio -Active noise cancellation with dedicated mic
Other features
Other features — specifications for U Ultra, Redmi K20 Pro Premium.
SpecificationU UltraRedmi K20 Pro Premium
Dop
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass - Fast battery charging (Quick Charge 3.0) - Also known as HTC Ocean Note
  • Sensors Fingerprint (under display
  • optical)
  • accelerometer
  • gyro
  • proximity
  • compass - Fast battery charging 27W (Quick Charge 4+)