Archos 55b Cobalt vs Motorola ROKR E8

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

    ROKR E8: 88 g lighter

    55b Cobalt:
    188 g
    ROKR E8:
    100 g
  • Screen diagonal

    ROKR E8: 3.5 in smaller diagonal

    55b Cobalt:
    5.5 in
    ROKR E8:
    2 in
  • Release year

    55b Cobalt:
    2017
    ROKR E8:
    2007

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. 55b Cobalt

    Height:
    Unknown
    Width:
    Unknown
    Depth:
    Unknown

    Unavailable dimensions are omitted from the drawing.

  2. 2. ROKR E8

    Height:
    115 mm
    Width:
    53 mm
    Depth:
    10.6 mm

Weight

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

  1. 1. 55b Cobalt

    188 g

    +88 g versus ROKR E8

  2. 2. ROKR E8

    100 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. 55b Cobalt

    Screen diagonal:
    5.5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    83.4 cm²
  2. 2. ROKR E8

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

55b Cobalt has approximately 573.2% more rectangular screen area than ROKR E8.

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.

55b Cobalt: Original memory entry

16/32 GB · 1/2 GB RAM

ROKR E8: Original memory entry

2 GB

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. 55b Cobalt

NFC:
See details Super AMOLED
Headphone jack:
Yes
Memory card support:
See details microSD · up to 64 GB (dedicated slot)

2. ROKR E8

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD (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. 55b Cobalt

    2600 mAh

    +1630 mAh versus ROKR E8

  2. 2. ROKR E8

    970 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. 55b Cobalt2. ROKR E8

Everyday essentials
Everyday essentials — specifications for 55b Cobalt, ROKR E8.
Specification55b CobaltROKR E8
Dimensions (HxWxD)
  • 155 Х 79 Х 0 mm
  • 115 Х 53 Х 10.6 mm
Weight
  • 188 g
  • 100 g
Technology
  • IPS LCD
  • TFT
Screen size
  • 5.5" inch
  • 2" inch
Screen resolution
  • 720 x 1280 px
  • 320 x 240 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 16/32 GB
  • 1/2 GB RAM
  • 2 GB
Memory card support
  • microSD
  • up to 64 GB (dedicated slot)
  • microSD (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 2600 mAh
  • Removable Li-Ion
  • 970 mAh
  • Removable Li-Ion
Operating system OS
  • Android 6.0 (Marshmallow)
  • Linux / Java-based MOTOMAGX
Chipset
  • Qualcomm MSM8909 Snapdragon 210 (28 nm)
Unknown
NFC
  • Super AMOLED
Unknown
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for 55b Cobalt, ROKR E8.
Specification55b CobaltROKR E8
Touchscreen
  • capacitive touchscreen
Unknown
Display colors
  • 16M
  • 256K
Screen area
  • 83.4 cm2
  • 12.4 cm2
Screen format
  • 16:9 (height:width)
  • 4:3 (height:width)
Screen to body ratio
  • 68.1%
  • 20.3%
PPI /points per inch/
  • 267 PPI
  • 200 PPI
Camera and Video
Camera and Video — specifications for 55b Cobalt, ROKR E8.
Specification55b CobaltROKR E8
Rear camera, main
  • 13 MP
  • Single
  • 2 MP
  • Single
Camera specs
  • 13 MP
  • AF
  • 2 MP
Functions
  • Dual-LED flash
  • HDR
  • panorama
Unknown
Video
  • 720p@30fps
  • Yes
Front camera, selfie
  • 2 MP
  • Single
  • 0 MP,
Specifications
  • 2 MP
Unknown
Performance

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

Performance — specifications for 55b Cobalt, ROKR E8.
Specification55b CobaltROKR E8
Processor CPU
  • Quad-core 1.1 GHz Cortex-A7
Unknown
Graphics processor GPU
  • Adreno 304
Unknown
Antutu 7 score *
  • 17741
Unknown
General specs
General specs — specifications for 55b Cobalt, ROKR E8.
Specification55b CobaltROKR E8
Release date
  • 2017
  • January
  • 2007
  • September
Colors
  • Gray
  • Dark Navy
  • Platinum
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 70 EUR
Battery life Unknown
  • Stand by time- Up to 300 h Talking time- Up to 5 h
Communication and Connectivity
Communication and Connectivity — specifications for 55b Cobalt, ROKR E8.
Specification55b CobaltROKR E8
SIM card
  • Single SIM (Mini-SIM)Dual SIM (Mini-SIM/Micro-SIM
  • dual stand-by)
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2-3G - HSDPA 900 / 2100-4G - LTE 800 / 1800 / 2100 / 2600
Unknown
Speed
  • HSPA 42.2/11.5 Mbps
  • LTE Cat4 150/50 Mbps
Unknown
GPRS
  • Yes
  • Class 12
Edge
  • Yes
  • Class 12
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi Direct
  • hotspot
  • No
GPS
  • Yes
  • with A-GPS
  • No
USB
  • microUSB 2.0
  • 2.0
Bluetooth
  • 4.0
  • A2DP
  • 2.0
  • A2DP
Harmful irradiation
  • SAR EU - 0.98 W/kg (head) 1.76 W/kg (body)
  • SAR - 1.02 W/kg (head) 0.85 W/kg (body) SAR EU - 0.89 W/kg (head)
Music and Audio
Music and Audio — specifications for 55b Cobalt, ROKR E8.
Specification55b CobaltROKR E8
Radio
  • FM radio
  • Stereo FM radio
Others Unknown
  • ModeShift morphing keypad -Navigation scroll wheel
Other features
Other features — specifications for 55b Cobalt, ROKR E8.
Specification55b CobaltROKR E8
Dop
  • Sensors Fingerprint (rear-mounted)
  • Sensors Accelerometer
  • proximity
  • MP3/AAC player -Organizer