BLU J2 vs Xiaomi Redmi K30

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

    J2: 62 g lighter

    J2:
    146 g
    Redmi K30:
    208 g
  • Width

    J2: 3.5 mm narrower

    J2:
    73.1 mm
    Redmi K30:
    76.6 mm
  • Screen diagonal

    J2: 1.67 in smaller diagonal

    J2:
    5 in
    Redmi K30:
    6.67 in
  • Rear camera layout

    J2:
    Single
    Redmi K30:
    Quad
  • Depth

    Redmi K30: 1.5 mm thinner

    J2:
    10.3 mm
    Redmi K30:
    8.8 mm
  • Height

    J2: 21.3 mm shorter

    J2:
    144 mm
    Redmi K30:
    165.3 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. J2

    Height:
    144 mm
    Width:
    73.1 mm
    Depth:
    10.3 mm +1.5 mm versus Redmi K30
  2. 2. Redmi K30

    Height:
    165.3 mm +21.3 mm versus J2
    Width:
    76.6 mm +3.5 mm versus J2
    Depth:
    8.8 mm

Weight

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

  1. 1. J2

    146 g

  2. 2. Redmi K30

    208 g

    +62 g versus J2

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. J2

    Screen diagonal:
    5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    68.9 cm²
  2. 2. Redmi K30

    Screen diagonal:
    6.67 in
    Aspect ratio (height:width):
    20:9
    Approximate rectangular screen area:
    107.4 cm²

Redmi K30 has approximately 55.8% more rectangular screen area than J2.

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 J2, Redmi K30, compared at the same storage capacity.
StorageJ2Redmi K30
32 GB 1 GB RAM Not recorded
64 GB Not recorded 6 GB RAM
128 GB Not recorded 6 / 8 GB RAM Alternative RAM configurations
256 GB Not recorded 8 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. J2

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSDXC

2. Redmi K30

NFC:
Yes
Headphone jack:
Yes
Memory card support:
See details microSD · up to 256 GB (uses shared SIM 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. J2

    2000 mAh

  2. 2. Redmi K30

    4500 mAh

    +2500 mAh versus J2

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. J22. Redmi K30

Everyday essentials
Everyday essentials — specifications for J2, Redmi K30.
SpecificationJ2Redmi K30
Dimensions (HxWxD)
  • 144 Х 73.1 Х 10.3 mm
  • 165.3 Х 76.6 Х 8.8 mm
Weight
  • 146 g
  • 208 g
Technology
  • IPS LCD
  • IPS LCD
Screen size
  • 5" inch
  • 6.67" inch
Screen resolution
  • 480 x 854 px
  • 1080 x 2400 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 32GB 1GB RAM
  • 64GB 6GB RAM
  • 128GB 6GB RAM
  • 128GB 8GB RAM
  • 256GB 8GB RAM
Memory card support
  • microSDXC
  • microSD
  • up to 256 GB (uses shared SIM slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 2000 mAh
  • Li-Po
  • 4500 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 8.1 Oreo (Go edition)
  • Android 10; MIUI 11
Chipset Unknown
  • Qualcomm SDM730 Snapdragon 730G (8 nm)
NFC Unknown
  • Yes
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for J2, Redmi K30.
SpecificationJ2Redmi K30
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 68.9 cm2
  • 107.4 cm2
Screen format
  • 16:9 (height:width)
  • 20:9 (height:width)
Screen to body ratio
  • 65.4%
  • 84.8%
PPI /points per inch/
  • 196 PPI
  • 395 PPI
Screen protection Unknown
  • Corning Gorilla Glass 5
Camera and Video
Camera and Video — specifications for J2, Redmi K30.
SpecificationJ2Redmi K30
Rear camera, main
  • 5 MP
  • Single
  • 64 MP
  • Quad
Camera specs
  • 5 MP
  • 64 MP
  • f/1.9
  • 26mm (wide)
  • 1/1.72''
  • 0.8µm
  • PDAF -8 MP
  • f/2.2
  • 13mm (ultrawide)
  • 1/4''
  • 1.12µm -2 MP
  • f/2.4
  • 1/5''
  • 1.75µm (dedicated macro camera) -2 MP
  • 1.75µm
  • depth sensor
Functions
  • LED flash
  • HDR
Video
  • 720p@30fps
  • 1080p@30fps
Front camera, selfie
  • 5 MP
  • Single
  • 20 MP
  • Dual
Specifications
  • 5 MP
  • 20 MP
  • f/2.2
  • 27mm (wide)
  • 1/3.4''
  • 0.8µm 2 MP
  • f/2.4
  • 1/5''
  • 1.75µm
  • depth sensor
Performance

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

Performance — specifications for J2, Redmi K30.
SpecificationJ2Redmi K30
Processor CPU
  • Quad-core 1.3 GHz Cortex-A7
  • Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver)
Graphics processor GPU
  • Mali-400
  • Adreno 618
Antutu 8 score * Unknown
  • 279345
GeekBench 5 Single Core * Unknown
  • 542
GeekBench 5 Multi-Core * Unknown
  • 1685
General specs
General specs — specifications for J2, Redmi K30.
SpecificationJ2Redmi K30
Release date
  • 2019
  • December
  • 2019
  • December
Colors
  • Blue
  • Black
  • Brown
  • Blue
  • Red
  • Purple
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 50 EUR
  • 210 EUR
Communication and Connectivity
Communication and Connectivity — specifications for J2, Redmi K30.
SpecificationJ2Redmi K30
SIM card
  • Dual SIM (Nano-SIM
  • dual stand-by)
  • 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 CDMA2000 1xEV-DO -4G - LTE band 1(2100)
  • 3(1800)
  • 5(850)
  • 8(900)
  • 34(2000)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA 21.1/5.76 Mbps
  • HSPA 42.2/5.76 Mbps
  • LTE-A
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi Direct
  • hotspot
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • Wi-Fi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
  • GLONASS
  • GALILEO
  • BDS
USB
  • microUSB 2.0
  • 2.0
  • Type-C 1.0 reversible connector
  • USB On-The-Go
Bluetooth
  • 4.1
  • A2DP
  • LE
  • 5.0
  • A2DP
  • LE
  • aptX HD
Music and Audio
Music and Audio — specifications for J2, Redmi K30.
SpecificationJ2Redmi K30
Radio
  • FM radio
  • FM radio
Others Unknown
  • HDR10 -120Hz
  • 24-bit/192kHz audio -Active noise cancellation with dedicated mic
Other features
Other features — specifications for J2, Redmi K30.
SpecificationJ2Redmi K30
Dop
  • Sensors Accelerometer For USA
  • Sensors Fingerprint (side-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass
  • Infrared port - Fast battery charging 27W (100% in 68 min)