Xiaomi Redmi Pro vs Yezz Billy 4

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

    Billy 4: 65 g lighter

    Redmi Pro:
    174 g
    Billy 4:
    109 g
  • Width

    Billy 4: 11.8 mm narrower

    Redmi Pro:
    76.2 mm
    Billy 4:
    64.4 mm
  • Screen diagonal

    Billy 4: 1.5 in smaller diagonal

    Redmi Pro:
    5.5 in
    Billy 4:
    4 in
  • Rear camera layout

    Redmi Pro:
    Dual
    Billy 4:
    Single
  • Depth

    Redmi Pro: 1.7 mm thinner

    Redmi Pro:
    8.2 mm
    Billy 4:
    9.9 mm
  • Height

    Billy 4: 29 mm shorter

    Redmi Pro:
    151.5 mm
    Billy 4:
    122.5 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. Redmi Pro

    Height:
    151.5 mm +29 mm versus Billy 4
    Width:
    76.2 mm +11.8 mm versus Billy 4
    Depth:
    8.2 mm
  2. 2. Billy 4

    Height:
    122.5 mm
    Width:
    64.4 mm
    Depth:
    9.9 mm +1.7 mm versus Redmi Pro

Weight

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

  1. 1. Redmi Pro

    174 g

    +65 g versus Billy 4

  2. 2. Billy 4

    109 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. Redmi Pro

    Screen diagonal:
    5.5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    83.4 cm²
  2. 2. Billy 4

    Screen diagonal:
    4 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    45.5 cm²

Redmi Pro has approximately 83.1% more rectangular screen area than Billy 4.

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.

Redmi Pro: Original memory entry

128 GB · 4 GB RAM - Exclusive edition32/64 GB · 3 GB RAM - other editions

Billy 4: Original memory entry

4 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. Redmi Pro

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 256 GB (uses SIM 2 slot)

2. Billy 4

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 256 GB

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. Redmi Pro

    4050 mAh

    +2750 mAh versus Billy 4

  2. 2. Billy 4

    1300 mAh

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. Redmi Pro2. Billy 4

Everyday essentials
Everyday essentials — specifications for Redmi Pro, Billy 4.
SpecificationRedmi ProBilly 4
Dimensions (HxWxD)
  • 151.5 Х 76.2 Х 8.2 mm
  • 122.5 Х 64.4 Х 9.9 mm
Weight
  • 174 g
  • 109 g
Technology
  • AMOLED
  • TFT
Screen size
  • 5.5" inch
  • 4" inch
Screen resolution
  • 1080 x 1920 px
  • 480 x 800 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 128 GB
  • 4 GB RAM - Exclusive edition32/64 GB
  • 3 GB RAM - other editions
  • 4 GB
  • 512 MB RAM
Memory card support
  • microSD
  • up to 256 GB (uses SIM 2 slot)
  • microSD
  • up to 256 GB
Battery Capacity is not battery life. No endurance test is implied.
  • 4050 mAh
  • Non-removable Li-Ion
  • 1300 mAh
  • Removable Li-Ion
Operating system OS
  • Android 6.0 (Marshmallow); MIUI 10
  • Microsoft Windows Phone 8.1
Chipset
  • Mediatek MT6797T Helio X25 (20 nm) High & Exclusive editions -Mediatek MT6797 Helio X20 (20 nm) Standard edition
  • Qualcomm MSM8212 Snapdragon 200 (28 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Redmi Pro, Billy 4.
SpecificationRedmi ProBilly 4
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 83.4 cm2
  • 45.5 cm2
Screen format
  • 16:9 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 72.2%
  • 57.7%
PPI /points per inch/
  • 401 PPI
  • 233 PPI
Camera and Video
Camera and Video — specifications for Redmi Pro, Billy 4.
SpecificationRedmi ProBilly 4
Rear camera, main
  • 13 MP
  • Dual
  • 8 MP
  • Single
Camera specs
  • 13 MP
  • f/2.0
  • PDAF -5 MP
  • depth sensor
  • 8 MP
  • AF
Functions
  • Dual-LED dual-tone flash
  • HDR
  • panorama
  • LED flash
Video
  • 1080p@30fps
  • 720p@30fps
Front camera, selfie
  • 5 MP
  • Single
  • 1.3 MP
  • Single
Specifications
  • 5 MP
  • f/2.0
  • 1.3 MP
Performance

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

Performance — specifications for Redmi Pro, Billy 4.
SpecificationRedmi ProBilly 4
Processor CPU
  • Deca-core 2.5 GHz Exclusive edition -Deca-core 2.3 GHz High edition -Deca-core 2.1 GHz Standard edition
  • Quad-core 1.2 GHz Cortex-A7
Graphics processor GPU
  • Mali-T880 MP4
  • Adreno 302
GeekBench 4 Single Core *
  • 1648
Unknown
GeekBench 4 Multi-Core *
  • 4014
Unknown
GeekBench 4 RenderScript *
  • 3133
Unknown
General specs
General specs — specifications for Redmi Pro, Billy 4.
SpecificationRedmi ProBilly 4
Release date
  • 2016
  • July
  • 2014
  • June
Colors
  • Silver
  • Gold
  • Gray
  • White
  • Black
  • Red
  • Gun Metal
  • Blue
  • Yellow
  • Champing Gold
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 170 EUR
Unknown
Battery life Unknown
  • Stand by time- Up to 350 h (2G) / Up to 300 h (3G) Talking time- Up to 7 h (2G) / Up to 4 h 30 min (3G)
Body build
  • Front glass
  • aluminum body
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for Redmi Pro, Billy 4.
SpecificationRedmi ProBilly 4
SIM card
  • Hybrid Dual SIM (Nano-SIM/ Micro-SIM
  • dual stand-by)
  • Dual SIM (Micro-SIM)
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 / 1900 -3G - HSDPA 850 / 900 / 1900 / 2100 CDMA2000 1xEV-DO TD-SCDMA -4G - LTE band 1(2100)
  • 3(1800)
  • 5(850)
  • 7(2600)
  • 8(900)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
Speed
  • HSPA
  • LTE
  • HSPA 42.2/5.76 Mbps
GPRS
  • Yes
  • Class 12
Edge
  • Yes
  • Class 12
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi Direct
  • hotspot
  • Wi-Fi 802.11 a/b/g/n
  • dual-band
  • hotspot
GPS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
  • Yes
  • with A-GPS
  • GLONASS
USB
  • Type-C 1.0 reversible connector
  • microUSB 2.0
Bluetooth
  • 4.2
  • A2DP
  • LE
  • 4.0
  • A2DP
Music and Audio
Music and Audio — specifications for Redmi Pro, Billy 4.
SpecificationRedmi ProBilly 4
Radio
  • FM radio; recording
  • Stereo FM radio
Others
  • Active noise cancellation with dedicated mic
Unknown
Other features
Other features — specifications for Redmi Pro, Billy 4.
SpecificationRedmi ProBilly 4
Dop
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass
  • Infrared port
  • Sensors Accelerometer
  • proximity