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AT&T

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

  • Based on 252 reviews
Condition: New
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Availability: Only 1 left in stock, order soon!
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Arrives within 30 days
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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


CPU Speed: 1.3 GHz


Memory Storage Capacity: 4 GB


Screen Size: 2.8 inches


Resolution: 720 x 1520


Refresh Rate: 60


Model Name: Cingular Flex 2


Operating System: KaiOS


RAM Memory Installed: 512 MB


Processor Series: Mediatek Dimensity 1100


Processor Speed: 1.3 GHz


Memory Storage Capacity: 4 GB


Color: Classic Navy


SIM Card Slot Count: Single SIM


Connector Type: USB Type C


Form Factor: Flip


Sim Card Size: Nano


Water Resistance Level: Not Water Resistant


Headphones Jack: [Unknown]


Flash Memory Supported Size Maximum: 4 GB


Rear Facing Camera Photo Sensor Resolution: 2 mp


Number of Rear Facing Cameras: 1


Number of Front Cameras: 1


Battery Capacity: 1400 milliamp_hours


Battery Power: 2800 amp_hours


Item Weight: 0.21 kg


Phone Talk Time: 6.4 hours


Average Battery Life Talk Time: 6 hours


GPS Geotagging Functionality: True


Screen Size: 2.8 inches


Resolution: 720 x 1520


Refresh Rate: 60


Display Type: LCD


Display Resolution Maximum: 720 x 1440


Wireless Provider: Unlocked


Cellular Technology: 4G


Connectivity Technology: 4G LTE


Wireless Network Technology: LTE


Brand: AT&T


Built-In Media: Power Adapter


Warranty Description: 90 Day Warranty


Manufacturer: AT&T


Specific Uses For Product: Entertainment


UPC: 642461111217


Unit Count: 1 Count


Video Capture Resolution: 1080p


Frame Rate: 30 fps


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: within 30 days

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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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great phone.
Phone was as described. Works great.
Reviewed in the United States on July 26, 2026 by Tiwanna
    • Didn't work for long
We are 5 months in and the phone is broken.
Reviewed in the United States on June 3, 2026 by Amazon Customer
    • Phone for 98 years old mother
Very old fashion but easier for seniors to use.
Reviewed in the United States on August 30, 2025 by Larry
    • this phone leaves a lot to be desired
i do not care for this phone at all, it is a major pain in the ass to text and having to select abc for every single text is so stupid. i do not like the set up for contacts and trying to send messages, i miss my TCL phone and really really really do not like this phone at all
Reviewed in the United States on July 7, 2026 by CINDY KELLIE
    • Good phone
Perfect phone for my husband.
Reviewed in the United States on July 13, 2026 by Charlotte
    • Good feature/flip/dumb phone, but know what you are buying.
Review Image by Walter
Review Image by 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
    • Usability
Great flip phone for the elderly
Reviewed in the United States on July 15, 2026 by kathleen dalseg
    • Easy to access all calls
Replaces an older version that was failing. Does not transfer any from a previous version. I had to manually add all infor back in.
Reviewed in the United States on July 5, 2026 by Flower Child

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