alcatel OT-991 vs Celkon Millennia Hero

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

    Millennia Hero: 18.3 g lighter

    OT-991:
    131.3 g
    Millennia Hero:
    113 g
  • Width

    Millennia Hero: 4 mm narrower

    OT-991:
    68 mm
    Millennia Hero:
    64 mm
  • Height

    OT-991: 3 mm shorter

    OT-991:
    122 mm
    Millennia Hero:
    125 mm
  • Release year

    OT-991:
    2012
    Millennia Hero:
    2015

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. OT-991

    Height:
    122 mm
    Width:
    68 mm +4 mm versus Millennia Hero
    Depth:
    10.8 mm
  2. 2. Millennia Hero

    Height:
    125 mm +3 mm versus OT-991
    Width:
    64 mm
    Depth:
    11 mm

Weight

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

  1. 1. OT-991

    131.3 g

    +18.3 g versus Millennia Hero

  2. 2. Millennia Hero

    113 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. OT-991

    Screen diagonal:
    4 in
    Aspect ratio (height:width):
    3:2
    Approximate rectangular screen area:
    47.6 cm²
  2. 2. Millennia Hero

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

OT-991 has approximately 4.6% more rectangular screen area than Millennia Hero.

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 OT-991, Millennia Hero, compared at the same storage capacity.
StorageOT-991Millennia Hero
8 GB Unknown 1 GB RAM
OT-991: Original memory entry

150 MB

Practical features

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

1. OT-991

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

2. Millennia Hero

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 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. OT-991

    1500 mAh

  2. 2. Millennia Hero

    1700 mAh

    +200 mAh versus OT-991

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. OT-9912. Millennia Hero

Everyday essentials
Everyday essentials — specifications for OT-991, Millennia Hero.
SpecificationOT-991Millennia Hero
Dimensions (HxWxD)
  • 122 Х 68 Х 10.8 mm
  • 125 Х 64 Х 11 mm
Weight
  • 131.3 g
  • 113 g
Technology
  • TFT
Unknown
Screen size
  • 4" inch
  • 4" inch
Screen resolution
  • 320 x 480 px
  • 480 x 800 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 150 MB
  • 8 GB
  • 1 GB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • microSD
  • up to 32 GB
Battery Capacity is not battery life. No endurance test is implied.
  • 1500 mAh
  • Removable Li-Ion
  • 1700 mAh
  • Li-Ion
Operating system OS
  • Android 2.3 (Gingerbread)
  • Android 5.1 (Lollipop)
Chipset
  • Mediatek MT6573 (65 nm)
Unknown
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for OT-991, Millennia Hero.
SpecificationOT-991Millennia Hero
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 256K
Unknown
Screen area
  • 47.6 cm2
  • 45.5 cm2
Screen format
  • 3:2 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 57.4%
  • 56.9%
PPI /points per inch/
  • 144 PPI
  • 233 PPI
Camera and Video
Camera and Video — specifications for OT-991, Millennia Hero.
SpecificationOT-991Millennia Hero
Rear camera, main
  • 3.15 MP
  • Single
  • 5 MP
  • Single
Camera specs
  • 3.15 MP
  • 5 MP
Functions
  • LED flash
  • LED flash
Video
  • Yes
  • Yes
Front camera, selfie
  • 0.3 MP
  • Single
  • 3.2 MP
  • Single
Specifications Unknown
  • 3.2 MP
Performance
Performance — specifications for OT-991, Millennia Hero.
SpecificationOT-991Millennia Hero
Processor CPU
  • 800 MHz Cortex-A9
  • Quad-core 1.2 GHz
Graphics processor GPU
  • PowerVR SGX531
Unknown
General specs
General specs — specifications for OT-991, Millennia Hero.
SpecificationOT-991Millennia Hero
Release date
  • 2012
  • February
  • 2015
  • August
Colors
  • Black
  • White
  • Black
  • White/Gold
  • White/Silver
  • Black/Gold
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 130 EUR
Unknown
Battery life
  • Stand by time- Up to 400 h Talking time- Up to 12 h (2G) / Up to 10 h (3G)
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for OT-991, Millennia Hero.
SpecificationOT-991Millennia Hero
SIM card
  • Mini-SIM
  • Dual SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
  • Show all network frequencies: -2G - GSM 900 / 1800 - SIM 1 & SIM 2
Speed
  • HSPA 7.2/0.384 Mbps
  • HSPA
GPRS
  • Class 12
  • Yes
Edge
  • Class 12
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • hotspot
  • Wi-Fi 802.11 b/g/n
GPS
  • Yes
  • with A-GPS
  • A-GPS
USB
  • microUSB 2.0
  • microUSB 2.0
Bluetooth
  • 4.0
  • A2DP
  • 2.0
Harmful irradiation
  • SAR EU - 0.54 W/kg (head) 0.84 W/kg (body)
  • SAR EU - 0.34 W/kg (head) 0.76 W/kg (body)
Music and Audio
Music and Audio — specifications for OT-991, Millennia Hero.
SpecificationOT-991Millennia Hero
Radio
  • Stereo FM radio
  • RDS
  • FM radio
Other features
Other features — specifications for OT-991, Millennia Hero.
SpecificationOT-991Millennia Hero
Dop
  • Sensors Accelerometer
  • proximity
  • compass - MP3/AAC+/WAV/WMA player -MP4/H.264 player -Document viewer -Photo viewer/editor -Organizer -Voice memo -Predictive text input
  • Sensors Accelerometer