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AT&T

AT&T Cingular Flex 2 Smart Flip, 4GB, Unlocked Phone (Classic Navy)

  • Based on 43 reviews
Condition: New
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Availability: Only 7 left in stock, order soon!
Fulfilled by Polo's Store Front
Arrives Sep 19 – Sep 23
Order within 11 hours and 52 minutes
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Features

  • Enjoy crisp visuals on the vibrant display, whether you're watching videos, browsing the web, or scrolling through social media.
  • 4GB Storage: Offers plenty of space for apps, photos, and essential files, all while maintaining smooth performance.
  • Sleek Design: The Classic Navy color gives this phone a professional yet modern look. Lightweight and comfortable to hold, perfect for everyday use.
  • Camera: Capture memorable moments with the built-in camera, offering clear photos and videos.
  • Efficient Performance: Powered by a reliable processor, the Cingular Flex 2 ensures smooth multitasking and fast app loading times.

Description

AT&T 6723D Cingular Flex 2, 4GB, Unlocked Phone (Classic Navy) Upgrade your mobile experience with the AT&T 6723D Cingular Flex 2! This unlocked phone is a perfect choice for those looking for a sleek, stylish, and feature-packed device with reliable performance. Available in a sophisticated Classic Navy color, the Cingular Flex 2 is equipped with 4GB of storage, providing plenty of space for apps, photos, and more. Whether you're using it for work, social media, or entertainment, this phone offers smooth performance and versatility.

Brand: AT&T


Operating System: KaiOS


Ram Memory Installed Size: 512 MB


CPU Model: Mediatek Dimensity 1100


Memory Storage Capacity: 4 GB


Resolution: 720 x 1520


Model Name: Cingular Flex 2


Wireless Carrier: Unlocked


Cellular Technology: 4G


Connectivity Technology: 4G LTE


Package Dimensions: 4.69 x 2.91 x 2.13 inches


Item Weight: 7.4 ounces


Item model number: 6723D


Batteries: 1 Lithium Ion batteries required. (included)


OS: KaiOS


Connectivity technologies: 4G LTE


GPS: True


Other display features: Wireless


Scanner Resolution: 720 x 1520


Form Factor: Flip


Color: Classic Navy


Battery Power Rating: 2800 Amp Hours


Whats in the box: Power Adapter


Manufacturer: AT&T


Date First Available: February 11, 2025


Memory Storage Capacity: 4 GB


Ram Memory Installed Size: 512 MB


Battery Capacity: 1400 Milliamp Hours


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sep 19 – Sep 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Fits Perfect
A perfect fit if you ever had old style flip phone. Love it because it matches my old phone, but now it’s new again.
Reviewed in the United States on July 2, 2025 by Amazon Customer
    • Works just fine with a new up to date sim, no issues.
I’m in love, I got this as a backup mental health break phone. Just whenever I wanna feel a little disconnected from the world’s craziness. If you’re debating it for similar reasons just do it!
Reviewed in the United States on June 25, 2025 by Levi
    • No information at all is included in the box
Won't work with a Tello SIM, don't listen to anyone telling you different. I haven't used a cell phone in years; nothing about this thing was apparent to me. There is a tiny notch for opening the back of the phone which I couldn't see with a naked eye, Google AI hipped me to this and the rest of what should be in a manual with the product. this is literally incredibly lame afaic. The battery with it was at 84%. 70 bucks seems very high to me considering. EDIT: one cent would be high considering. With an AT&T SIM it connected to literally nothing as a dumb phone. I don't know what it does with Wifi enabled, but I'm not trying to do that at all. Flat RIPOFF AFAIC. ... show more
Reviewed in the United States on June 5, 2025 by U-Fraidees
    • Cell phone
It works
Reviewed in the United States on May 28, 2025 by joyce kincherlow
    • Basic great phone
Why did you pick this product vs others?: Needed a basic unlocked flip phone. Perfect.
Reviewed in the United States on June 25, 2025 by Kindle Customer
    • Works great on Tello and supports 5G E
Works really well on Tello and great value for money. I was partially expecting it not to work as it's an AT&T phone but it is truly unlocked as mentioned in the listing and should work with Verizon, T-Mobile, AT&T and all Mvno based on those networks. If you are on AT&T, the phone also supports AT&T's LTEa (marketed as "5G E") network, despite it showing 4G LTE. ... show more
Reviewed in the United States on May 14, 2025 by Nameer
    • Good feature/flip/dumb phone, but know what you are buying.
Review Image by Walter Walter
Review Image by Walter Walter
It's a flip phone. Had it for about a week now. Some of the basics: - No touch screen. External screen is normally off when in standby but turns on when receiving notifications, being plugged in, or interacting with any of the buttons. Fingerprint magnet but I like that the background here also switches to whatever you set your home screen background to, adding a little extra bit of personalization. You can set a PIN if privacy is a concern. OS Languages included are English, Spanish, French, Portuguese, Chinese, and Vietnamese. Individual apps sometimes have options beyond that. - Unlocked, which means in theory that it works with any carrier. Have had no issues using it with Tello in the US. SIM slot is located behind battery on back of device. - Runs KaiOS. Do research to see if that operating system works for you. You are limited to the apps on KaiOS store and what comes preinstalled on phone. This model has YouTube (not very practical) and a feature-reduced version of Google Maps. There are other utilities like email, weather, and a music player for downloaded music (no streaming here). QR code reader does not seem to be able to read any QR codes tested so far. There are misleading FULL SCREEN ADVERTISEMENTS on any apps downloaded from the store (weather, news, and podcast apps all count). I've found them unobtrusive but beware if phone is intended for a less internet-savvy senior. - Unsurprisingly camera quality is very crude, but you can take photos and videos easily. There is a physical button on the side of the device that acts as a camera shortcut. - Texting has group chat functionality but no voice to text. Can't seem to send photos at all, I get an error message every time. Media sent to me has been hit or miss. Sometimes I receive photos texted to me and sometimes I don't. Bugs + other negative qualities: beyond the advertisements in utility apps and general bugginess, I've found the interface to be overall slow (yes, even for a flip phone). Twice now the entire OS has crashed without explanation. The phone has issues staying consistently connected to internet, which means getting spammed with audio notifications that the WiFi is disconnected even though I disabled all notices for network settings. One of the most major downsides is the battery life. It drains much quicker than my cheap android smartphone and charges much slower as well. Overall, I'm using this as an alternative to a smartphone and will be keeping it for now, but probably replacing it in the near future with a pricier, more stable dumbphone. Updating this review if anything changes. ... show more
Reviewed in the United States on May 28, 2025 by Walter Walter
    • This is a great phone for seniors who do not want to switch to Jitterbug phone.
My mother is 75 years old, and it is great for her age group. A simple phone that calls and texts, that's all she needs to get the job done.
Reviewed in the United States on June 2, 2025 by Seeker Lioness

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