Asus PadFone Infinity 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: 32 g lighter

    PadFone Infinity:
    141 g
    Billy 4:
    109 g
  • Width

    Billy 4: 8.4 mm narrower

    PadFone Infinity:
    72.8 mm
    Billy 4:
    64.4 mm
  • Screen diagonal

    Billy 4: 1 in smaller diagonal

    PadFone Infinity:
    5 in
    Billy 4:
    4 in
  • Chipset

    PadFone Infinity:
    Qualcomm APQ8064T Snapdragon 600
    Billy 4:
    Qualcomm MSM8212 Snapdragon 200 (28 nm)
  • Depth

    PadFone Infinity: 1 mm thinner

    PadFone Infinity:
    8.9 mm
    Billy 4:
    9.9 mm
  • Height

    Billy 4: 21 mm shorter

    PadFone Infinity:
    143.5 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. PadFone Infinity

    Height:
    143.5 mm +21 mm versus Billy 4
    Width:
    72.8 mm +8.4 mm versus Billy 4
    Depth:
    8.9 mm
  2. 2. Billy 4

    Height:
    122.5 mm
    Width:
    64.4 mm
    Depth:
    9.9 mm +1 mm versus PadFone Infinity

Weight

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

  1. 1. PadFone Infinity

    141 g

    +32 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. PadFone Infinity

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

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

PadFone Infinity has approximately 51.3% 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 PadFone Infinity, Billy 4, compared at the same storage capacity.
StoragePadFone InfinityBilly 4
32 GB 2 GB RAM Unknown
64 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. PadFone Infinity

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

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. PadFone Infinity

    2400 mAh

    +1100 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. PadFone Infinity2. Billy 4

Everyday essentials
Everyday essentials — specifications for PadFone Infinity, Billy 4.
SpecificationPadFone InfinityBilly 4
Dimensions (HxWxD)
  • 143.5 Х 72.8 Х 8.9 mm
  • 122.5 Х 64.4 Х 9.9 mm
Weight
  • 141 g
  • 109 g
Technology
  • Super IPS+ LCD
  • TFT
Screen size
  • 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.
  • 32/64 GB
  • 2 GB RAM
  • 4 GB
  • 512 MB RAM
Memory card support
  • No
  • microSD
  • up to 256 GB
Battery Capacity is not battery life. No endurance test is implied.
  • 2400 mAh
  • Non-removable Li-Po
  • 1300 mAh
  • Removable Li-Ion
Operating system OS
  • Android 4.1.2 (Jelly Bean)
  • upgradable to 4.4.2 (KitKat)
  • Microsoft Windows Phone 8.1
Chipset
  • Qualcomm APQ8064T Snapdragon 600
  • Qualcomm MSM8212 Snapdragon 200 (28 nm)
NFC
  • Yes
Unknown
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for PadFone Infinity, Billy 4.
SpecificationPadFone InfinityBilly 4
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 68.9 cm2
  • 45.5 cm2
Screen format
  • 16:9 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 66.0%
  • 57.7%
PPI /points per inch/
  • 441 PPI
  • 233 PPI
Screen protection
  • Corning Gorilla Glass
Unknown
Camera and Video
Camera and Video — specifications for PadFone Infinity, Billy 4.
SpecificationPadFone InfinityBilly 4
Rear camera, main
  • 13 MP
  • Single
  • 8 MP
  • Single
Camera specs
  • 13 MP
  • AF
  • 8 MP
  • AF
Functions
  • LED flash
  • LED flash
Video
  • 1080p@30fps
  • 720p@30fps
Front camera, selfie
  • 2 MP
  • Single
  • 1.3 MP
  • Single
Specifications
  • 2 MP
  • 1.3 MP
Performance

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

Performance — specifications for PadFone Infinity, Billy 4.
SpecificationPadFone InfinityBilly 4
Processor CPU
  • Quad-core 1.7 GHz Krait
  • Quad-core 1.2 GHz Cortex-A7
Graphics processor GPU
  • Adreno 320
  • Adreno 302
Antutu 7 score *
  • 25384
Unknown
General specs
General specs — specifications for PadFone Infinity, Billy 4.
SpecificationPadFone InfinityBilly 4
Release date
  • 2013
  • February
  • 2014
  • June
Colors
  • Titanium Gray
  • Champagne Gold
  • Hot pink
  • White
  • Black
  • Red
  • Gun Metal
  • Blue
  • Yellow
  • Champing Gold
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 1000 EUR
Unknown
Battery life
  • Stand by time- Up to 410 h Talking time- Up to 19 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 PadFone Infinity, Billy 4.
SpecificationPadFone InfinityBilly 4
SIM card
  • Nano-SIM
  • Dual SIM (Micro-SIM)
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 -3G - HSDPA 900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 7(2600)
  • 20(800)
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
Speed
  • HSPA 42.2/5.76 Mbps
  • LTE Cat3 100/50 Mbps
  • HSPA 42.2/5.76 Mbps
GPRS
  • Class 10
  • Class 12
Edge
  • Class 10
  • Class 12
Wi-Fi
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • Wi-Fi Direct
  • hotspot
  • Wi-Fi 802.11 a/b/g/n
  • dual-band
  • hotspot
GPS
  • Yes
  • with A-GPS
  • GLONASS
  • Yes
  • with A-GPS
  • GLONASS
USB
  • microUSB 2.0 (SlimPort TV-out)
  • USB Host
  • microUSB 2.0
Bluetooth
  • 4.0
  • A2DP
  • 4.0
  • A2DP
Music and Audio
Music and Audio — specifications for PadFone Infinity, Billy 4.
SpecificationPadFone InfinityBilly 4
Radio
  • FM radio
  • Stereo FM radio
Others
  • Active noise cancellation with dedicated mic
Unknown
Other features
Other features — specifications for PadFone Infinity, Billy 4.
SpecificationPadFone InfinityBilly 4
Dop
  • Sensors Accelerometer
  • gyro
  • proximity
  • compass - Padfone Station with 10.1 inches IPS display
  • 1920 x 1200 pixels
  • 5000 mAh battery
  • 1 MP front camera. 264.6 x 181.6 x 10.7mm
  • 530g. - Also known as Asus PadFone Infinity (A80)
  • Sensors Accelerometer
  • proximity