Lava Iris X8 vs vivo X21i

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.

  • Display technology

    OLED versus LCD

    Iris X8:
    LCD
    X21i:
    OLED
  • Width

    Iris X8: 4 mm narrower

    Iris X8:
    71 mm
    X21i:
    75 mm
  • Screen diagonal

    Iris X8: 1.28 in smaller diagonal

    Iris X8:
    5 in
    X21i:
    6.28 in
  • Rear camera layout

    Iris X8:
    Single
    X21i:
    Dual
  • Depth

    X21i: 1.6 mm thinner

    Iris X8:
    8.6 mm
    X21i:
    7 mm
  • Height

    Iris X8: 11 mm shorter

    Iris X8:
    143.4 mm
    X21i:
    154.4 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. Iris X8

    Height:
    143.4 mm
    Width:
    71 mm
    Depth:
    8.6 mm +1.6 mm versus X21i
  2. 2. X21i

    Height:
    154.4 mm +11 mm versus Iris X8
    Width:
    75 mm +4 mm versus Iris X8
    Depth:
    7 mm

Weight

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

  1. 1. Iris X8

    160 g

    +1 g versus X21i

  2. 2. X21i

    159 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. Iris X8

    Screen diagonal:
    5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    68.9 cm²
  2. 2. X21i

    Screen diagonal:
    6.28 in
    Aspect ratio (height:width):
    19:9
    Approximate rectangular screen area:
    98.4 cm²

X21i has approximately 42.8% more rectangular screen area than Iris X8.

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.

Iris X8: Original memory entry

8 GB · 1 GB RAM/ 16 GB · 2 GB RAM

X21i: Original memory entry

128 GB · 4 GB RAM 64 GB · 6 GB 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. Iris X8

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

2. X21i

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 256 GB (uses SIM 2 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. Iris X8

    2500 mAh

  2. 2. X21i

    3425 mAh

    +925 mAh versus Iris X8

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. Iris X82. X21i

Everyday essentials
Everyday essentials — specifications for Iris X8, X21i.
SpecificationIris X8X21i
Dimensions (HxWxD)
  • 143.4 Х 71 Х 8.6 mm
  • 154.4 Х 75 Х 7 mm
Weight
  • 160 g
  • 159 g
Technology
  • IPS LCD
  • Super AMOLED
Screen size
  • 5" inch
  • 6.28" inch
Screen resolution
  • 720 x 1280 px
  • 1080 x 2280 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 8 GB
  • 1 GB RAM/ 16 GB
  • 2 GB RAM
  • 128 GB
  • 4 GB RAM 64 GB
  • 6 GB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • microSD
  • up to 256 GB (uses SIM 2 slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 2500 mAh
  • Non-removable Li-Po
  • 3425 mAh
  • Non-removable Li-Ion
Operating system OS
  • Android 4.4.2 (KitKat)
  • upgradable to 5.1 (Lollipop)
  • Android 8.1 (Oreo); Funtouch 4
Chipset Unknown
  • Mediatek MT6771 Helio P60 (12 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Iris X8, X21i.
SpecificationIris X8X21i
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 68.9 cm2
  • 98.4 cm2
Screen format
  • 16:9 (height:width)
  • 19:9 (height:width)
Screen to body ratio
  • 67.7%
  • 85.0%
PPI /points per inch/
  • 294 PPI
  • 402 PPI
Screen protection
  • Asahi Dragontrail Glass
Unknown
Camera and Video
Camera and Video — specifications for Iris X8, X21i.
SpecificationIris X8X21i
Rear camera, main
  • 8 MP
  • Single
  • 12 MP
  • Dual
Camera specs
  • 8 MP
  • 12 MP
  • f/1.8
  • 1/2.55''
  • 1.4µm
  • dual pixel PDAF -5 MP
  • f/2.0
  • depth sensor
Functions
  • Dual-LED flash
  • HDR
  • panorama
  • LED flash
  • HDR
  • panorama
Video
  • Yes
  • 1080p@30fps
Front camera, selfie
  • 3 MP
  • Single
  • 24 MP
  • Single
Specifications
  • 3 MP
  • 24 MP
Performance

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

Performance — specifications for Iris X8, X21i.
SpecificationIris X8X21i
Processor CPU
  • Octa-core 1.4 GHz Cortex-A7
  • Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)
Graphics processor GPU Unknown
  • Mali-G72 MP3
Antutu 7 score * Unknown
  • 130256
GeekBench 4 Single Core * Unknown
  • 1497
GeekBench 4 Multi-Core * Unknown
  • 5759
General specs
General specs — specifications for Iris X8, X21i.
SpecificationIris X8X21i
Release date
  • 2015
  • February
  • 2018
  • May
Colors
  • Black
  • White
  • Black
  • Aurora White
  • Ruby Red
  • Night Purple
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 130 EUR
  • 430 EUR
Battery life
  • Stand by time- Up to 291 h Talking time- Up to 14 h (2G) / Up to 9 h 40 min (3G)
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for Iris X8, X21i.
SpecificationIris X8X21i
SIM card
  • Dual SIM
  • Hybrid Dual SIM (Nano-SIM
  • dual stand-by)
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 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA -3G - HSDPA 850 / 900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 4(1700/2100)
  • 5(850)
  • 8(900)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA
  • HSPA
  • LTE
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • hotspot
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • WiFi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
  • GLONASS
USB
  • microUSB 2.0
  • microUSB 2.0
  • USB On-The-Go
Bluetooth
  • 4.0
  • A2DP
  • 5.0
  • A2DP
  • LE
Music and Audio
Music and Audio — specifications for Iris X8, X21i.
SpecificationIris X8X21i
Radio
  • FM radio
  • FM radio
Others
  • Active noise cancellation with dedicated mic
  • 32-bit/192kHz audio -Active noise cancellation with dedicated mic
Other features
Other features — specifications for Iris X8, X21i.
SpecificationIris X8X21i
Dop
  • Sensors Accelerometer
  • proximity - For India
  • Sensors Fingerprint (rear-mounted)
  • accelerometer
  • proximity
  • compass - Fast battery charging