NUU B40 5G, Cell Phone, Unlocked, Dual SIM, Dual AMOLED Display, 120Hz, 64 MP Camera, 8GB+256GB, Android 15, US Version, US 1 Yr Warranty, Midnight Grey

Price: $249.99
(as of May 07, 2026 15:00:15 UTC – Details)

Product description

Experience the Future of Mobile Technology with the NUU B40 5G

Discover the NUU B40 5G — featuring a 6.7″ FHD+ AMOLED main screen, a 1.6″ rear Vista Display and Dual SIM 5G support for a smarter, more connected mobile experience.

1 Tailored for You

2 AI Main Camera lens

3 Silky Touch

4 Vista Display

5 Touch Interaction

Carrier Compatible Unlock for T-Mobile | Mint Mobile | Metro by T-Mobile | Ultra Mobile | Tello | Q Link Wireless | Gen Mobile | Carrier Compatible Unlock for Lycamobile | Patriot Mobile | Telcel America | SpeedTalk Mobile | Hello Mobile | DOES “NOT WORK” With: NO AT&T | NO Cricket Wireless | NO Verizon | NO Boost mobile | NO Tracfone | NO Pulse Cellular | NO Union Wireless | Main Camera 64MP | Front 16MP | Marco 2MP | Main Display 6.7” AMOLEDS FHD+ 1080 x 2400 | 120 Hz | Rear Display 228 x 460 Battery 5000mAh Product Size 162.4(H) x 73.9(W) x 8.4 (L) mm 5G N2/5/25/41/48/66/71/77 4G B1/2/3/4/5/7/12/13/17/25/26/28/48/66/71 3G B1/2/4/5/8 2G B2/4/5/8 Connectivity Wi-Fi 802.11 ac/a/b/g/n (2.4GHz / 5GHz) | Bluetooth BT 5.2 | GPS with A-GPS Support | Data Cable Type-C to Type-C SIM Slot Dual SIM OS Andriod 15

Your Device for Your Needs

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Customer Reviews

4.3 out of 5 stars 83

3.8 out of 5 stars 256

4.3 out of 5 stars 260

3.9 out of 5 stars 280

3.9 out of 5 stars 482

Price

$249.99$249.99

$209.99$209.99

$99.99$99.99

$79.99$79.99

$79.99$79.99

Best For

Dual Screen and Multimedia

Gaming and Multimedia

Photography Enthusiast

Teenager Needs

Everyday Basic Tasks

Memory (RAM)

8GB

8GB

6GB + 6GB Extended RAM

6GB + 6GB Extended RAM

4GB + 4GB Extended RAM

Internal Storage

256 GB

256 GB

128GB

128GB

128GB

Network Technology

5G

5G

4G LTE

4G LTE

4G LTE

Dual Sim

✔

✔

✔

✔

✔

What can I do with the NUU B40 second display?

Without flipping your phone, you can check notifications and call previews, control music playback, monitor time, battery level, step count and selfies with the rear 64MP camera. Simple double tap activates it, faster way to stay connected.

Is the NUU B40 compatible with my carrier? Does it support Dual SIM?

The NUU B40 is a fully unlocked Dual SIM 5G phone compatible with T-Mobile, Mint Mobile, Metro, Qlink and Tello. Use two lines on one device — ideal for separating work and personal calls, or maximizing coverage on the go.

How good is the gaming performance on the NUU B40?

The NUU B40 features a 120Hz FHD+ AMOLED display, Octa-Core 2.5GHz processor and 8GB RAM for smooth, lag-free gameplay. Enjoy fluid motion, vivid colors and fast app loading — great for gaming, streaming and watching sports.

What is the camera setup on the NUU B40?

The NUU B40 has a 64MP rear camera, 2MP macro lens and 16MP front camera, all enhanced by AI optimization for sharp, clear shots in any lighting. Perfect for creators and everyday users of unlocked Android phones.

My NUU B40 5G phone isn’t charging to full. What should I check?

Check if Adaptive Charging (Battery Protection / Custom Charging Mode) is enabled in Settings. This optional feature limits charging to preserve battery health. Simply disable it — or adjust the charge limit — to restore full charging capacity.

STAY INFORMED WITHOUT UNLOCKING – Stay updated without waking your main screen. The innovative 1.6″ rear Vista Display gives you instant alerts without the need to open or unlock the primary display, making this the ideal smart phone for busy professionals on the move.
YOUR POCKET-SIZED ENTERTAINMENT POWERHOUSE – Immerse yourself in the action. From live NFL Sundays to blockbuster movies, the stunning 6.7″ FHD+ AMOLED screen and buttery-smooth 120Hz refresh rate ,8GB RAM, 256GB storagetransform this Cell Phone into a premium theater right in the palm of your hands.
ULTIMATE FREEDOM WITH TRUE DUAL SIM – Travel smart and easily separate work from play. Standing out among unlocked phones, this 5G device is ready out-of-the-box for major US carriers like T-Mobile, Mint, and Metro, giving you the ultimate flexibility to choose the best network for your lifestyle.
CAPTURE LIFE’S BEST MOMENTS LIKE A PRO – Elevate your social media game effortlessly. The AI-enhanced 64MP rear camera and 16MP front lens automatically adapt to any lighting condition, ensuring your photos and videos always look crisp, vibrant, and ready to share, setting a new standard for mobile phones.
RELIABLE ENERGY FOR YOUR BUSY LIFESTYLE – Leave your charger at home with confidence. Powered by a massive 5000mAh battery and the ultra-efficient Android 15 OS, this android phone delivers reliable, continuous energy that easily keeps up with your longest commutes and most demanding schedules.