Celkon A66 vs Oppo R2001 Yoyo

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

    A66: 47 g lighter

    A66:
    98 g
    R2001 Yoyo:
    145 g
  • Width

    A66: 2.3 mm narrower

    A66:
    67.2 mm
    R2001 Yoyo:
    69.5 mm
  • Screen diagonal

    A66: 0.2 in smaller diagonal

    A66:
    4.5 in
    R2001 Yoyo:
    4.7 in
  • Depth

    R2001 Yoyo: 1.8 mm thinner

    A66:
    11 mm
    R2001 Yoyo:
    9.2 mm
  • Height

    A66: 2.5 mm shorter

    A66:
    136 mm
    R2001 Yoyo:
    138.5 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. A66

    Height:
    136 mm
    Width:
    67.2 mm
    Depth:
    11 mm +1.8 mm versus R2001 Yoyo
  2. 2. R2001 Yoyo

    Height:
    138.5 mm +2.5 mm versus A66
    Width:
    69.5 mm +2.3 mm versus A66
    Depth:
    9.2 mm

Weight

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

  1. 1. A66

    98 g

  2. 2. R2001 Yoyo

    145 g

    +47 g versus A66

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. A66

    Screen diagonal:
    4.5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    55.8 cm²
  2. 2. R2001 Yoyo

    Screen diagonal:
    4.7 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    60.9 cm²

R2001 Yoyo has approximately 9.1% more rectangular screen area than A66.

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 A66, R2001 Yoyo, compared at the same storage capacity.
StorageA66R2001 Yoyo
4 GB Unknown 1 GB RAM
A66: 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. A66

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

2. R2001 Yoyo

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. A66

    2000 mAh

    +100 mAh versus R2001 Yoyo

  2. 2. R2001 Yoyo

    1900 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. A662. R2001 Yoyo

Everyday essentials
Everyday essentials — specifications for A66, R2001 Yoyo.
SpecificationA66R2001 Yoyo
Dimensions (HxWxD)
  • 136 Х 67.2 Х 11 mm
  • 138.5 Х 69.5 Х 9.2 mm
Weight
  • 98 g
  • 145 g
Technology
  • TFT
  • IPS LCD
Screen size
  • 4.5" inch
  • 4.7" inch
Screen resolution
  • 480 x 854 px
  • 540 x 960 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 4 GB
  • 512 MB RAM
  • 4 GB
  • 1 GB RAM
Memory card support
  • microSD
  • up to 32 GB
  • microSD
  • up to 32 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 2000 mAh
  • Li-Ion
  • 1900 mAh
  • Removable Li-Ion
Operating system OS
  • Android 4.1.2 (Jelly Bean)
  • Android 4.2.1 (Jelly Bean)
Chipset Unknown
  • Mediatek MT6582M (28 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for A66, R2001 Yoyo.
SpecificationA66R2001 Yoyo
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors Unknown
  • 16M
Screen area
  • 55.8 cm2
  • 60.9 cm2
Screen format
  • 16:9 (height:width)
  • 16:9 (height:width)
Screen to body ratio
  • 61.1%
  • 63.3%
PPI /points per inch/
  • 218 PPI
  • 234 PPI
Camera and Video
Camera and Video — specifications for A66, R2001 Yoyo.
SpecificationA66R2001 Yoyo
Rear camera, main
  • 3.15 MP
  • Single
  • 5 MP
  • Single
Camera specs
  • 3.15 MP
  • 5 MP
  • AF
Functions
  • LED flash
  • LED flash
Video
  • Yes
  • 720p
Front camera, selfie
  • 0.3 MP
  • Single
  • 2 MP
  • Single
Specifications
  • VGA
  • 2 MP
Performance

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

Performance — specifications for A66, R2001 Yoyo.
SpecificationA66R2001 Yoyo
Processor CPU
  • Dual-core 1.2 GHz
  • Quad-core 1.3 GHz Cortex-A7
Graphics processor GPU Unknown
  • Mali-400MP2
Antutu 7 score * Unknown
  • 16115
General specs
General specs — specifications for A66, R2001 Yoyo.
SpecificationA66R2001 Yoyo
Release date
  • 2014
  • 2014
  • May
Colors
  • White
  • Black
  • White
  • Black
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 200 EUR
Battery life
  • Stand by time- Up to 160 h Talking time- Up to 5 h
  • Stand by time- Up to 350 h Talking time- Up to 6 h
Communication and Connectivity
Communication and Connectivity — specifications for A66, R2001 Yoyo.
SpecificationA66R2001 Yoyo
SIM card
  • Dual SIM
  • Dual SIM (dual stand-by)
Network Unknown
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
Speed Unknown
  • HSPA 42.2/11.5 Mbps
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • hotspot
  • Wi-Fi 802.11 b/g/n
  • hotspot
GPS
  • Yes
  • Yes
  • with A-GPS
USB
  • microUSB
  • microUSB 2.0
Bluetooth
  • 2.0
  • 2.1
Harmful irradiation
  • SAR EU - 0.38 W/kg (head) 0.47 W/kg (body)
Unknown
Music and Audio
Music and Audio — specifications for A66, R2001 Yoyo.
SpecificationA66R2001 Yoyo
Radio
  • FM radio
  • FM radio
Other features
Other features — specifications for A66, R2001 Yoyo.
SpecificationA66R2001 Yoyo
Dop
  • Sensors Accelerometer
  • proximity
  • Sensors Accelerometer
  • proximity