Plum Check Plus vs Samsung DoubleTime I857

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.

  • Weight

    Check Plus: 6 g lighter

    Check Plus:
    142 g
    DoubleTime I857:
    148 g
  • Width

    DoubleTime I857: 1.4 mm narrower

    Check Plus:
    63.4 mm
    DoubleTime I857:
    62 mm
  • Screen diagonal

    DoubleTime I857: 1.3 in smaller diagonal

    Check Plus:
    4.5 in
    DoubleTime I857:
    3.2 in
  • Chipset

    Check Plus:
    Mediatek MT6572M (28 nm)
    DoubleTime I857:
    Qualcomm MSM7230
  • Depth

    Check Plus: 5.8 mm thinner

    Check Plus:
    9.2 mm
    DoubleTime I857:
    15 mm
  • Height

    DoubleTime I857: 17 mm shorter

    Check Plus:
    130 mm
    DoubleTime I857:
    113 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. Check Plus

    Height:
    130 mm +17 mm versus DoubleTime I857
    Width:
    63.4 mm +1.4 mm versus DoubleTime I857
    Depth:
    9.2 mm
  2. 2. DoubleTime I857

    Height:
    113 mm
    Width:
    62 mm
    Depth:
    15 mm +5.8 mm versus Check Plus

Weight

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

  1. 1. Check Plus

    142 g

  2. 2. DoubleTime I857

    148 g

    +6 g versus Check Plus

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. Check Plus

    Screen diagonal:
    4.5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    55.8 cm²
  2. 2. DoubleTime I857

    Screen diagonal:
    3.2 in
    Aspect ratio (height:width):
    3:2
    Approximate rectangular screen area:
    30.5 cm²

Check Plus has approximately 83.1% more rectangular screen area than DoubleTime I857.

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.

Check Plus: Original memory entry

4 GB · 512 MB RAM

DoubleTime I857: Original memory entry

260 MB · 256 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. Check Plus

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 64 GB

2. DoubleTime I857

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

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. Check Plus

    1500 mAh

    +300 mAh versus DoubleTime I857

  2. 2. DoubleTime I857

    1200 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. Check Plus2. DoubleTime I857

Everyday essentials
Everyday essentials — specifications for Check Plus, DoubleTime I857.
SpecificationCheck PlusDoubleTime I857
Dimensions (HxWxD)
  • 130 Х 63.4 Х 9.2 mm
  • 113 Х 62 Х 15 mm
Weight
  • 142 g
  • 148 g
Technology
  • IPS LCD
  • TFT
Screen size
  • 4.5" inch
  • 3.2" inch
Screen resolution
  • 480 x 854 px
  • 320 x 480 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 4 GB
  • 512 MB RAM
  • 260 MB
  • 256 MB RAM
Memory card support
  • microSD
  • up to 64 GB
  • microSD
  • up to 32 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1500 mAh
  • Removable Li-Ion
  • 1200 mAh
  • Removable Li-Ion
Operating system OS
  • Android 4.2.2 (Jelly Bean)
  • Android 2.2 (Froyo)
Chipset
  • Mediatek MT6572M (28 nm)
  • Qualcomm MSM7230
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Check Plus, DoubleTime I857.
SpecificationCheck PlusDoubleTime I857
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 256K
Screen area
  • 55.8 cm2
  • 30.5 cm2
Screen format
  • 16:9 (height:width)
  • 3:2 (height:width)
Screen to body ratio
  • 67.7%
  • 43.5%
PPI /points per inch/
  • 218 PPI
  • 180 PPI
Camera and Video
Camera and Video — specifications for Check Plus, DoubleTime I857.
SpecificationCheck PlusDoubleTime I857
Rear camera, main
  • 5 MP
  • Single
  • 3.15 MP
  • Single
Camera specs
  • 5 MP
  • AF
  • 3.15 MP
  • AF
Functions
  • LED flash
  • panorama
  • HDR
Unknown
Video
  • 720p@30fps
  • 320p
Front camera, selfie
  • 2 MP
  • Single
  • 0 MP,
Specifications
  • 2 MP
  • AF
Unknown
Performance

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

Performance — specifications for Check Plus, DoubleTime I857.
SpecificationCheck PlusDoubleTime I857
Processor CPU
  • Dual-core 1.2 GHz Cortex-A7
  • 800 MHz Scorpion
Graphics processor GPU
  • Mali-400
  • Adreno 205
Antutu 7 score *
  • 5784
Unknown
General specs
General specs — specifications for Check Plus, DoubleTime I857.
SpecificationCheck PlusDoubleTime I857
Release date
  • 2014
  • May
  • 2011
  • October
Colors
  • White/Blue
  • White/Red
  • Black/black
  • Black/Lime
  • Black/Red
  • Black/White
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 70 EUR
Battery life
  • Stand by time- Up to 750 h (2G) / Up to 650 h (3G) Talking time- Up to 17 h (2G) / Up to 14 h (3G)
  • Stand by time- Up to 250 h Talking time- Up to 6 h
Communication and Connectivity
Communication and Connectivity — specifications for Check Plus, DoubleTime I857.
SpecificationCheck PlusDoubleTime I857
SIM card
  • Dual SIM
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
Speed
  • HSPA 21.1/5.76 Mbps
  • HSPA 7.2/2 Mbps
GPRS
  • Class 12
  • Yes
Edge
  • Class 12
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • hotspot
  • No
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
USB
  • microUSB 2.0
  • microUSB 2.0
Bluetooth
  • 4.0
  • A2DP
  • 3.0
  • A2DP
Harmful irradiation Unknown
  • SAR - 0.54 W/kg (head) 0.97 W/kg (body)
Music and Audio
Music and Audio — specifications for Check Plus, DoubleTime I857.
SpecificationCheck PlusDoubleTime I857
Radio
  • FM radio
  • No
Others Unknown
  • Secondary TFT capacitive touchscreen (with multitouch)
  • 320 x 480 pixels
  • 3.2 inches
Other features
Other features — specifications for Check Plus, DoubleTime I857.
SpecificationCheck PlusDoubleTime I857
Dop
  • Sensors Accelerometer
  • gyro
  • proximity - Also known as Plum Z450
  • Sensors Accelerometer
  • proximity
  • compass - MP4/H.264 player -MP3/WAV/eAAC+ player -Organizer -Photo/video editor -Document viewer -Voice memo/dial/commands -Predictive text input - For AT&T