HTC U Ultra vs Xiaomi Mi 6

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

    Mi 6: 9.3 mm narrower

    U Ultra:
    79.8 mm
    Mi 6:
    70.5 mm
  • Screen diagonal

    Mi 6: 0.55 in smaller diagonal

    U Ultra:
    5.7 in
    Mi 6:
    5.15 in
  • Chipset

    U Ultra:
    Qualcomm MSM8996 Snapdragon 821 (14 nm)
    Mi 6:
    Qualcomm MSM8998 Snapdragon 835 (10 nm)
  • Rear camera layout

    U Ultra:
    Single
    Mi 6:
    Dual
  • Depth

    Mi 6: 0.5 mm thinner

    U Ultra:
    8 mm
    Mi 6:
    7.5 mm
  • Height

    Mi 6: 17.2 mm shorter

    U Ultra:
    162.4 mm
    Mi 6:
    145.2 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 +17.2 mm versus Mi 6
    Width:
    79.8 mm +9.3 mm versus Mi 6
    Depth:
    8 mm +0.5 mm versus Mi 6
  2. 2. Mi 6

    Height:
    145.2 mm
    Width:
    70.5 mm
    Depth:
    7.5 mm

Weight

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

  1. 1. U Ultra

    170 g

    +2 g versus Mi 6

  2. 2. Mi 6

    168 g

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. Mi 6

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

U Ultra has approximately 22.5% more rectangular screen area than Mi 6.

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

Mi 6: Original memory entry

64/128 GB · 6 GB RAM 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. U Ultra

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

2. Mi 6

NFC:
Yes
Headphone jack:
No
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. Mi 6

    3350 mAh

    +350 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. Mi 6

Everyday essentials
Everyday essentials — specifications for U Ultra, Mi 6.
SpecificationU UltraMi 6
Dimensions (HxWxD)
  • 162.4 Х 79.8 Х 8 mm
  • 145.2 Х 70.5 Х 7.5 mm
Weight
  • 170 g
  • 168 g
Technology
  • Super LCD5
  • IPS LCD
Screen size
  • 5.7" inch
  • 5.15" inch
Screen resolution
  • 1440 x 2560 px
  • 1080 x 1920 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 64/128 GB
  • 512GB 4GB
  • 64/128 GB
  • 6 GB RAM 64 GB
  • 512GB 4GB
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
  • 3350 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 7.0 (Nougat)
  • upgradable to Android 8.0 (Oreo)
  • Android 7.1.1 (Nougat); MIUI 8
Chipset
  • Qualcomm MSM8996 Snapdragon 821 (14 nm)
  • Qualcomm MSM8998 Snapdragon 835 (10 nm)
NFC
  • Yes
  • Yes
Headphone jack
  • No
  • No
Display
Display — specifications for U Ultra, Mi 6.
SpecificationU UltraMi 6
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 90.3 cm2
  • 73.1 cm2
Screen format
  • 16:9 (height:width)
  • 16:9 (height:width)
Screen to body ratio
  • 69.7%
  • 71.4%
PPI /points per inch/
  • 513 PPI
  • 428 PPI
Screen protection
  • Corning Gorilla Glass 5 (64 GB version)Sapphire crystal glass (128 GB version)
  • Corning Gorilla Glass 4
Camera and Video
Camera and Video — specifications for U Ultra, Mi 6.
SpecificationU UltraMi 6
Rear camera, main
  • 12 MP
  • Single
  • 12 MP
  • Dual
Camera specs
  • 12 MP
  • f/1.8
  • 26mm (wide)
  • 1/2.3''
  • 1.55µm
  • OIS
  • PDAF & laser AF
  • 12 MP
  • f/1.8
  • 27mm (wide)
  • 1/2.9''
  • 1.25µm
  • 4-axis OIS
  • PDAF -12 MP
  • f/2.6
  • 52mm (telephoto)
  • 1.0µm
  • AF
  • 2x optical zoom
Functions
  • Auto-HDR
  • Dual-LED dual-tone flash
  • HDR
  • panorama
Video
  • 1080p@30fps
  • 1080p@30fps
Front camera, selfie
  • 16 MP
  • Single
  • 8 MP
  • Single
Specifications
  • 16 MP
  • 8 MP
Performance

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

Performance — specifications for U Ultra, Mi 6.
SpecificationU UltraMi 6
Processor CPU
  • Quad-core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo)
  • Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)
Graphics processor GPU
  • Adreno 530
  • Adreno 540
Antutu 7 score *
  • 168385
  • 205305
GeekBench 4 Single Core *
  • 1662
  • 1894
GeekBench 4 Multi-Core *
  • 3920
  • 6193
GeekBench 4 RenderScript *
  • 7174
  • 7657
Antutu 8 score * Unknown
  • 261141
GeekBench 4 Battery * Unknown
  • 3620
GeekBench 5 Single Core *
  • 302
  • 368
GeekBench 5 Multi-Core *
  • 795
  • 1463
General specs
General specs — specifications for U Ultra, Mi 6.
SpecificationU UltraMi 6
Release date
  • 2017
  • January
  • 2017
  • April
Colors
  • Brilliant Black
  • Cosmetic Pink
  • Ice White
  • Sapphire Blue
  • Ceramic Black
  • Black
  • Blue
  • White
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 250 EUR
  • 330 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
  • stainless steel frame
Communication and Connectivity
Communication and Connectivity — specifications for U Ultra, Mi 6.
SpecificationU UltraMi 6
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)
  • 7(2600)
  • 8(900)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA 42.2/5.76 Mbps
  • LTE-A (3CA) Cat11 600/50 Mbps
  • HSPA 42.2/5.76 Mbps
  • LTE-A (3CA) Cat9 450/50 Mbps
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
  • DLNA
  • hotspot
GPS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
USB
  • 3.1
  • Type-C 1.0 reversible connector
  • Type-C 1.0 reversible connector
Bluetooth
  • 4.2
  • A2DP
  • LE
  • 5.0
  • A2DP
  • LE
Music and Audio
Music and Audio — specifications for U Ultra, Mi 6.
SpecificationU UltraMi 6
Radio
  • No
  • No
Others
  • Secondary display
  • 160 x 1040 pixels
  • 2 inches
  • 24-bit/192kHz audio -Active noise cancellation with dedicated mic
  • Active noise cancellation with dedicated mic
Other features
Other features — specifications for U Ultra, Mi 6.
SpecificationU UltraMi 6
Dop
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass - Fast battery charging (Quick Charge 3.0) - Also known as HTC Ocean Note
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass
  • barometer
  • Infrared port - Fast battery charging (Quick Charge 3.0) - Splash resistant - For Global market