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BLU J4 Specifications
For USA
Blu
Released 2019, Oct 15
1 GB RAM
- 158g, 10mm thickness
- Android 8.1 Oreo
- 32GB storage, microSDXC
Views
Genze vs community
Genze and community ratings are both shown on a /10 scale. Genze is derived from internal model scores and price rules; community averages come from approved reviews (1–10 per category).
| Category | Genze /10 | Users /10 |
|---|---|---|
| Battery | 4.3 | — |
| Display | 4.8 | — |
| Performance | 2.6 | — |
| Camera | 3.6 | — |
| Body | 5.2 | — |
| Gaming | 3.6 | — |
| Software | 4.4 | — |
| Connectivity | 1.6 | — |
| Sensors | 7.2 | — |
| Software updates | — | — |
| Clean software | — | — |
| Heating | — | — |
| Media | — | — |
Community columns fill in when reviews are approved.
Quick specifications
5.5"
720x1440 pixels
8MP
720p
1GB RAM
2200mAh
Score breakdown
From specs, price tier & release year
Community ratings
Real-world feedback from people who use this device
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Full specifications
|
Network
|
Technology | GSM / HSPA |
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | |
| 3G bands | HSDPA 850 / 900 / 1900 / 2100 | |
| Speed | HSPA 21.1/5.76 Mbps |
|
Launch
|
Announced | 2019, October. Released 2019, October |
|---|---|---|
| Status | Discontinued |
|
Body
|
Dimensions | 151 x 72.3 x 10 mm (5.94 x 2.85 x 0.39 in) |
|---|---|---|
| Weight | 158 g (5.57 oz) | |
| SIM | Nano-SIM + Nano-SIM |
|
Display
|
Type | IPS LCD |
|---|---|---|
| Size | 5.5 inches, 78.1 cm2 (~71.5% screen-to-body ratio) | |
| Resolution | 720 x 1440 pixels, 18:9 ratio (~293 ppi density) |
|
Platform
|
OS | Android 8.1 Oreo (Go edition) |
|---|---|---|
| CPU | Quad-core 1.3 GHz Cortex-A7 | |
| GPU | Mali-400 |
|
Memory
|
Card slot | microSDXC |
|---|---|---|
| Internal | 32GB 1GB RAM | |
| ??? | eMMC 5.1 |
|
Main Camera
|
Single | 8 MP, AF |
|---|---|---|
| Features | LED flash | |
| Video | 720p@30fps |
|
Selfie camera
|
Single | 8 MP |
|---|---|---|
| Video | 720p@30fps |
|
Sound
|
Loudspeaker | Yes |
|---|---|---|
| 3.5mm jack | Yes |
|
Comms
|
WLAN | Wi-Fi 802.11 b/g/n, Wi-Fi Direct |
|---|---|---|
| Bluetooth | 4.1, A2DP, LE | |
| Positioning | GPS | |
| NFC | No | |
| Radio | FM radio | |
| USB | microUSB 2.0 |
|
Features
|
Sensors | Accelerometer |
|---|
|
Battery
|
Type | Li-Po 2200 mAh, removable |
|---|
|
Misc
|
Colors | Blue, Black, Brown |
|---|---|---|
| Price | About 70 EUR |
BLU J4 official images
Frequently asked questions
Is BLU J4 worth buying in 2026?
BLU J4 is worth considering if its strengths match your priorities. Genze scores it 3.9/10 for its class. Read owner reviews and compare alternatives before you buy.
What is the battery capacity of BLU J4?
BLU J4 has a 2,200 mAh battery. Real-world endurance depends on chipset efficiency, display, and usage.
What display size does BLU J4 have?
BLU J4 features a 5.50-inch display. See the Display section for resolution, refresh rate, and panel details.
How much RAM does BLU J4 have?
BLU J4 is available with 1 GB RAM variants. Storage options are listed in the Memory section.
What is the Genze score for BLU J4?
Genze rates BLU J4 3.9/10 based on performance, display, camera, battery, body build, and value versus phones in the same price tier.
Where do these specifications come from?
Specifications are compiled from official manufacturer and carrier sources, reviewed by our editors where possible, and enriched with Genze scores and community feedback. GenZe Rank is not responsible for errors or omissions. Regional variants, firmware updates, and retailer listings may differ from what is shown here—always confirm critical details on the official product page before you buy.
Owner reviews
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