







Product description
B40 5G Dual Display 

1 Tailored for You
2 AI Main Camera lens
3 Silky Touch
4 Vista Display
5 Touch Interaction
Experience the Future of Mobile Technology with the NUU B40 5G 
Discover the NUU B40 5G with Dual AMOLED Display technology. Featuring a 6.7″ FHD+ AMOLED main screen and a 1.6″ rear Vista Display, this device offers a unique mobile experience. With powerful performance, advanced camera capabilities and 5G connectivity.
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

VISTA DISPLAY – DUAL DISPLAY FOR INSTANT ACCESS: Stay connected faster with this dual‑display cell phone, featuring a 1.6″ rear Vista Display for quick updates and a 6.7″ FHD+ AMOLED main screen that delivers vibrant visuals, smooth performance and an immersive experience for gaming, streaming and everyday use—optimized for dual‑display convenience and productivity.
DUAL SIM, DOUBLE THE FREEDOM: Stay connected your way with this unlock phone, offering true Dual SIM support so you can separate work and personal lines, enjoy better coverage and switch networks smoothly wherever you go.
SMOOTH GAMING PERFORMANCE: Level up your experience with NUU B40 gaming phone. Enjoy ultra-smooth 120Hz gameplay on a 6.7″ FHD+ AMOLED display that brings vibrant colors and fluid motion to life. This NUU phone delivers for gaming, streaming and watching sports.
AI-ENHANCED PHOTOGRAPHY: Capture stunning detail with a 64MP rear camera, 2MP macro camera and 16MP front camera, powered by AI optimization for crystal-clear shots in any lighting. Perfect for creators and everyday users of unlocked android phones.
FAST 5G SMARTPHONE PERFORMANCE: Dual SIM 5G cell phone. Powered by the Octa-Core 2.5GHz processor, 8GB RAM, 256GB storage and a 5000mAh battery. Support for users on T-Mobile, Mint, Metro, Qlink and Tello.
8 reviews for 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
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Original price was: $299.99.$199.99Current price is: $199.99.

Paul parres –
Bought it for 1 reason, kept it for many more.
Uuhhhhh, I thought the second screen on the back was a pretty cool feature, but once I got the phone, it is pretty useless. It has 4 pages (?) I guess, music, camera, a compass, and the main screen, which fur some reason is called the dial. And there’s , I think, 10 options fur his how it looks. I dunno, I bought the phone cuz of the second screen, after I checked it out, I haven’t used it again. And it seems to always be on. There aren’t many settings for it. , maybe it’ll be better in later versions? Who knows. Even so, the phone itself is a good phone. Lots of ram, and an internal 256 gb is pretty nice. Would be better if I could put in a memory card but it’s not expandable. The camera has hella modes, which is cool. The phone is thin and light. Also, it’s unlocked, and it’s 100% compatible with my cell service. My last 2 phones weren’t and some of the features didn’t work. So it’s a good phone, good price, battery is not as big as other phones, but seems to last long, charges hella quick. You won’t be disappointed if you buy it.
Keller –
Best phone
This is a great phone best phone to date, fast, screen bright, battery life is very good, great feel, great quality, good value for your money, the only problem with phone is, I can not find a case at all for phone, I would recommend this to anyone.
Accelred –
Not expensive
Very nice phone.
Orlando Nava –
Not bad for the price. Good phone.
Highly recommended for low budget, this phone is just about right. Slim phone, all day battery, games no lag, 120hz display, amo led display, dual sim, 5g, camera is okay. A back screen that makes it unique. They need to work on phone storage. Everything else are good.¹
Porsche Neale –
Great buy
This is a great phone. Up to date. Very fast and updated and ultra reliable . Highly recommend. Used with mint mobile
Joe Augustine –
Great Phone for the money .
I like the phone, the fingerprint reader is a bit tricky but the camera is decent enough and the phone is really quick so good value for the money.
rg –
Good phone. For the price
It works great and decent camera nice space. Plays games well. Doesn’t get hot just got warm after a few hours of gaming. Just sound is ok could be better.
Sleefany –
Looks like the oneplus 7 pro
The phone feels and looks great in the hand. When I opened it I had a moment of nostalgia. The design is virtually identical to my old Oneplus 7 pro (arguably one of the best OnePlus phones ever released). The only real difference in look is the back of the phone, and lack of a pop-up camera. The size, shape, curvature, etc is the same. So if you want to get a good idea of how this phone actually looks you can take a look at videos of the OnePlus 7 pro.For bluetooth headphone users the phone supports the following codecs: SBC, AAC, aptX, aptX HD, LDAC, LC3, Opus, Savitech LHDC V3/V4, and Savitech LHDC-V.The device delivers solid performance for everyday tasks, though it makes expected compromises in areas like haptic feedback, audio quality, and lacks premium features like wireless charging and NFC.I have snappy responsiveness, excellent battery life, and the back screen is genuinely useful for quick glances at notifications, messages, and camera selfies.The software has some bugs. In particular the dynamic screen refresh is not working properly. It is supposed to be capped at 90hz to save battery, but it goes to 120hz. That isn’t a huge deal, but is something I noticed.Pros-Rear display makes it easy to get info at a glance-Excellent value at $200-Clean Android 15: Minimal bloatware, near-stock experience-Charges FAST-Consistent performance my daily tasks were smooth-Passable cameras – not as good as flagship, but still goodCons-Curved display is a pain if you use screen protectors-The vibration is weak-Single speaker – only one speaker on the bottom-No wireless charging or NFC-The back display does not allow third-party apps-Not for gaming – it is too slow for fast paced gamesI had not heard of Nuu prior to this phone. I wrongly assumed it was just another Chinese manufacturer.NUU is an American smartphone manufacturer headquartered in Irving, Texas (Dallas-Fort Worth area), founded in 2010 as a joint venture between Hong Kong-based Sun Cupid Group and U.S.-based Noetic Inc. The company has been manufacturing Google-certified Android smartphones since 2012, operating in over 40 countries with offices in Hong Kong, London, and Dubai.—-Overall not a bad phone, and definitely good for the price. I would recommend it if you are on a budget.