NUU B40 5G Cell Phone Unlocked, T-Mobile,8GB+256GB, Midnight Grey
$249.99
| Operating System |
Android 15 |
|---|---|
| RAM Memory Installed |
8 GB |
| Processor Speed |
2.5 GHz |
| Memory Storage Capacity |
256 GB |
| Color |
Midnight Grey |
| SIM Card Slot Count |
Dual SIM |
| Connector Type |
USB Type C |
| Form Factor |
Bar |
| Biometric Security Feature |
Fingerprint Recognition |
| Sim Card Size |
Nano |
| Water Resistance Level |
Not Water Resistant |
| Headphones Jack |
USB Type-C |
| Compatible Devices |
T-Mobile |
| EU Spare Part Availability Duration |
1 years |
| Additional Features |
Dual Display, Dual SIM, Rear display phone |
| Flash Memory Supported Size Maximum |
256 GB |
| Front Photo Sensor Resolution |
16 mp |
| Rear Facing Camera Photo Sensor Resolution |
64 mp |
| Camera Description |
Front, Rear |
| Camera Flash |
LED |
| Number of Rear Facing Cameras |
2 |
| Number of Front Cameras |
2 |
| Battery Capacity |
5000 milliamp_hours |
| Battery Description |
Lithium-Polymer |
| Battery Power |
5000 milliamp_hours |
| Effective Video Resolution |
64 mp |
| Video Capture Resolution |
9216 x 6912 |
| Frame Rate |
120 fps |
| Screen Size |
6.7 inches |
| Resolution |
1080 x 2400 |
| Refresh Rate |
120 |
| Display Type |
AMOLED |
| Display Resolution Maximum |
1080×2400 |
| Display Pixel Density |
393 pixels_per_inch |
| Wireless Provider |
Unlocked |
| Cellular Technology |
5G |
| Connectivity Technology |
Bluetooth |
| Wireless Network Technology |
Wi-Fi |
| Brand |
NUU |
| Model Year |
2025 |
| Built-In Media |
Phone Case, Power Adapter, USB Cable |
| Warranty Description |
1 Year Manufacturer |
| Manufacturer |
Nuu Mobile |
| Model Series |
B40 |
| Specific Uses For Product |
gaming, streaming, photography |
| Unit Count |
1 Count |
| ASIN |
B0FRMRZDFM |
| Item Weight |
187 g |
| Battery Average Life |
38 hours |
| Phone Talk Time |
38 hours |
| GPS Geotagging Functionality |
A-GPS |
| Supported Satellite Navigation System |
GPS |
Price: $249.99
(as of Sep 25, 2026 20:35:35 UTC – Details)
Product description
Experience the Future of Mobile Technology with the NUU B40 5G Cell Phone 
Discover the NUU B40 5G Cell Phone Unlocked— 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.
Unlocked Android Smartphone with Dual OLED Display 
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
Unlocked 5G Phone 
Your Device for Your Needs
Add to Cart
Add to Cart
Customer Reviews
4.2 out of 5 stars 104
3.8 out of 5 stars 271
4.1 out of 5 stars 307
3.8 out of 5 stars 341
4.0 out of 5 stars 504
Price
$249.99$249.99
$209.99$209.99
—
—
—
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, 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 Cell Phone 5G 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 – NUU B40 android unlocked phone 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 5G 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 t mobile phones unlocked 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 5g android smartphone 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.
8 reviews for NUU B40 5G Cell Phone Unlocked, T-Mobile,8GB+256GB, Midnight Grey
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