Toshiba K01 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: 49 g lighter

    K01:
    158 g
    Billy 4:
    109 g
  • Chipset

    K01:
    Qualcomm QSD8250 Snapdragon S1
    Billy 4:
    Qualcomm MSM8212 Snapdragon 200 (28 nm)
  • Depth

    Billy 4: 3 mm thinner

    K01:
    12.9 mm
    Billy 4:
    9.9 mm
  • Release year

    K01:
    2010
    Billy 4:
    2014

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. K01

    Height:
    122 mm
    Width:
    65 mm
    Depth:
    12.9 mm +3 mm versus Billy 4
  2. 2. Billy 4

    Height:
    122.5 mm
    Width:
    64.4 mm
    Depth:
    9.9 mm

Weight

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

  1. 1. K01

    158 g

    +49 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. K01

    Screen diagonal:
    4.1 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    47.8 cm²
  2. 2. Billy 4

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

K01 has approximately 5.1% 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.

K01: Original memory entry

256 MB RAM · 512 MB ROM

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. K01

NFC:
Unknown
Headphone jack:
No
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. K01

    1000 mAh

  2. 2. Billy 4

    1300 mAh

    +300 mAh versus K01

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. K012. Billy 4

Everyday essentials
Everyday essentials — specifications for K01, Billy 4.
SpecificationK01Billy 4
Dimensions (HxWxD)
  • 122 Х 65 Х 12.9 mm
  • 122.5 Х 64.4 Х 9.9 mm
Weight
  • 158 g
  • 109 g
Technology
  • AMOLED
  • TFT
Screen size
  • 4.1" inch
  • 4" inch
Screen resolution
  • 480 x 800 px
  • 480 x 800 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 256 MB RAM
  • 512 MB ROM
  • 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.
  • 1000 mAh
  • Removable Li-Ion
  • 1300 mAh
  • Removable Li-Ion
Operating system OS
  • Microsoft Windows Mobile 6.5 Professional
  • upgradable to Windows Mobile 6.5.3
  • Microsoft Windows Phone 8.1
Chipset
  • Qualcomm QSD8250 Snapdragon S1
  • Qualcomm MSM8212 Snapdragon 200 (28 nm)
Headphone jack
  • No
  • Yes
Display
Display — specifications for K01, Billy 4.
SpecificationK01Billy 4
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 65K
  • 16M
Screen area
  • 47.8 cm2
  • 45.5 cm2
Screen format
  • 5:3 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 60.3%
  • 57.7%
PPI /points per inch/
  • 228 PPI
  • 233 PPI
Camera and Video
Camera and Video — specifications for K01, Billy 4.
SpecificationK01Billy 4
Rear camera, main
  • 3.15 MP
  • Single
  • 8 MP
  • Single
Camera specs
  • 3.15 MP
  • AF
  • 8 MP
  • AF
Functions Unknown
  • LED flash
Video
  • 480p@30fps
  • 720p@30fps
Front camera, selfie
  • 0.3 MP
  • Single
  • 1.3 MP
  • Single
Specifications Unknown
  • 1.3 MP
Performance
Performance — specifications for K01, Billy 4.
SpecificationK01Billy 4
Processor CPU
  • 1.0 GHz Scorpion
  • Quad-core 1.2 GHz Cortex-A7
Graphics processor GPU
  • Adreno 200
  • Adreno 302
General specs
General specs — specifications for K01, Billy 4.
SpecificationK01Billy 4
Release date
  • 2010
  • February
  • 2014
  • June
Colors
  • Black
  • White
  • White
  • Black
  • Red
  • Gun Metal
  • Blue
  • Yellow
  • Champing Gold
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)
Communication and Connectivity
Communication and Connectivity — specifications for K01, Billy 4.
SpecificationK01Billy 4
SIM card
  • Mini-SIM
  • Dual SIM (Micro-SIM)
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
Speed
  • HSPA 7.2/2 Mbps
  • HSPA 42.2/5.76 Mbps
GPRS
  • Class 10
  • Class 12
Edge
  • Class 10
  • Class 12
Wi-Fi
  • Wi-Fi 802.11b/g
  • Wi-Fi 802.11 a/b/g/n
  • dual-band
  • hotspot
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
  • GLONASS
USB
  • microUSB 2.0
  • microUSB 2.0
Bluetooth
  • 2.0
  • A2DP
  • EDR
  • 4.0
  • A2DP
Harmful irradiation
  • SAR - 0.37 W/kg (head) 0.36 W/kg (body)
Unknown
Music and Audio
Music and Audio — specifications for K01, Billy 4.
SpecificationK01Billy 4
Radio
  • No
  • Stereo FM radio
Other features
Other features — specifications for K01, Billy 4.
SpecificationK01Billy 4
Dop
  • Sensors Accelerometer Pocket Office -MP3/WAV/WMA/eAAC+ player -MP4/H.264/WMV player -Organizer -Facebook and YouTube apps -Photo editor -Voice memo/dial/commands -Predictive text input Also known as Toshiba IS02
  • Sensors Accelerometer
  • proximity