Xiaomi Redmi Note Prime 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: 76 g lighter

    Redmi Note Prime:
    185 g
    Billy 4:
    109 g
  • Width

    Billy 4: 14.3 mm narrower

    Redmi Note Prime:
    78.7 mm
    Billy 4:
    64.4 mm
  • Screen diagonal

    Billy 4: 1.5 in smaller diagonal

    Redmi Note Prime:
    5.5 in
    Billy 4:
    4 in
  • Chipset

    Redmi Note Prime:
    Qualcomm MSM8916 Snapdragon 410 (28 nm)
    Billy 4:
    Qualcomm MSM8212 Snapdragon 200 (28 nm)
  • Depth

    Redmi Note Prime: 0.5 mm thinner

    Redmi Note Prime:
    9.4 mm
    Billy 4:
    9.9 mm
  • Height

    Billy 4: 31.5 mm shorter

    Redmi Note Prime:
    154 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 Note Prime

    Height:
    154 mm +31.5 mm versus Billy 4
    Width:
    78.7 mm +14.3 mm versus Billy 4
    Depth:
    9.4 mm
  2. 2. Billy 4

    Height:
    122.5 mm
    Width:
    64.4 mm
    Depth:
    9.9 mm +0.5 mm versus Redmi Note Prime

Weight

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

  1. 1. Redmi Note Prime

    185 g

    +76 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 Note Prime

    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 Note Prime 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.

Recorded RAM for Redmi Note Prime, Billy 4, compared at the same storage capacity.
StorageRedmi Note PrimeBilly 4
16 GB 2 GB RAM Unknown
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 Note Prime

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB (dedicated 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 Note Prime

    3100 mAh

    +1800 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 Note Prime2. Billy 4

Everyday essentials
Everyday essentials — specifications for Redmi Note Prime, Billy 4.
SpecificationRedmi Note PrimeBilly 4
Dimensions (HxWxD)
  • 154 Х 78.7 Х 9.4 mm
  • 122.5 Х 64.4 Х 9.9 mm
Weight
  • 185 g
  • 109 g
Technology
  • IPS LCD
  • TFT
Screen size
  • 5.5" inch
  • 4" inch
Screen resolution
  • 720 x 1280 px
  • 480 x 800 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 16 GB
  • 2 GB RAM
  • 4 GB
  • 512 MB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • microSD
  • up to 256 GB
Battery Capacity is not battery life. No endurance test is implied.
  • 3100 mAh
  • Removable Li-Po
  • 1300 mAh
  • Removable Li-Ion
Operating system OS
  • Android 4.4.4 (KitKat); MIUI 9.2
  • Microsoft Windows Phone 8.1
Chipset
  • Qualcomm MSM8916 Snapdragon 410 (28 nm)
  • Qualcomm MSM8212 Snapdragon 200 (28 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Redmi Note Prime, Billy 4.
SpecificationRedmi Note PrimeBilly 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
  • 68.8%
  • 57.7%
PPI /points per inch/
  • 267 PPI
  • 233 PPI
Camera and Video
Camera and Video — specifications for Redmi Note Prime, Billy 4.
SpecificationRedmi Note PrimeBilly 4
Rear camera, main
  • 13 MP
  • Single
  • 8 MP
  • Single
Camera specs
  • 13 MP
  • f/2.2
  • 28mm (wide)
  • AF
  • 8 MP
  • AF
Functions
  • LED flash
  • HDR
  • LED flash
Video
  • 720p
  • 720p@30fps
Front camera, selfie
  • 5 MP
  • Single
  • 1.3 MP
  • Single
Specifications
  • 5 MP
  • 1.3 MP
Performance
Performance — specifications for Redmi Note Prime, Billy 4.
SpecificationRedmi Note PrimeBilly 4
Processor CPU
  • Quad-core 1.2 GHz Cortex-A53
  • Quad-core 1.2 GHz Cortex-A7
Graphics processor GPU
  • Adreno 306
  • Adreno 302
General specs
General specs — specifications for Redmi Note Prime, Billy 4.
SpecificationRedmi Note PrimeBilly 4
Release date
  • 2015
  • December
  • 2014
  • June
Colors
  • White
  • White
  • Black
  • Red
  • Gun Metal
  • Blue
  • Yellow
  • Champing Gold
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 140 EUR
Unknown
Battery life
  • Stand by time- Up to 775 h (3G) Talking time- Up to 38 h (3G) Music play - Up to 60 h
  • 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)
Communication and Connectivity
Communication and Connectivity — specifications for Redmi Note Prime, Billy 4.
SpecificationRedmi Note PrimeBilly 4
SIM card
  • Dual SIM (Micro-SIM
  • dual stand-by)
  • Dual SIM (Micro-SIM)
Network
  • Show all network frequencies: -2G - GSM 900 / 1800 / 850 - SIM 1 & SIM 2 -3G - HSDPA 900 / 1900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 40(2300)
  • 41(2500)
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
Speed
  • HSPA
  • LTE Cat4 150/50 Mbps
  • HSPA 42.2/5.76 Mbps
GPRS
  • Yes
  • Class 12
Edge
  • Yes
  • Class 12
Wi-Fi
  • Wi-Fi 802.11 a/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
  • microUSB 2.0
  • USB Host
  • microUSB 2.0
Bluetooth
  • 4.0
  • A2DP
  • LE
  • 4.0
  • A2DP
Harmful irradiation
  • SAR - 0.50 W/kg (head)
Unknown
Music and Audio
Music and Audio — specifications for Redmi Note Prime, Billy 4.
SpecificationRedmi Note PrimeBilly 4
Radio
  • Stereo FM radio
  • Stereo FM radio
Others
  • Active noise cancellation with dedicated mic
Unknown
Other features
Other features — specifications for Redmi Note Prime, Billy 4.
SpecificationRedmi Note PrimeBilly 4
Dop
  • Sensors Accelerometer
  • gyro
  • proximity
  • compass - Fast battery charging: 30% in 30 min (Quick Charge 1.0)
  • Sensors Accelerometer
  • proximity