Your Phone

Speakerphone

You can use the speakerphone during a call by

pressing the or [speakerphone] key located on the top of the phone. The loudspeaker is automatically deactivated when you end the call.

Backlight

A backlight illuminates the display and the keypad. When you press any key or open the folder, the backlight turns on. It turns off if no key is pressed within a given period of time, depending on the Backlight Timer menu option. After 30 seconds, the display turns off to conserve your battery power. To specify the length of time the backlight is active, set the Backlight Timer menu option (Menu 9.2.3).

Headset jack

Side key

PTT key - Use for quick access to the PTT function.

Pressing and releasing this key while idle displays your PTT contacts.

Pressing and holding this key while idle displays your PTT history.

Pressing and holding this key while in a PTT call allows you to speak to the other call participants.

External Display

Your phone has an external display on the cover. It indicates when you have an incoming call or a message. It also alerts you at the specified time when you set an alarm by turning on its backlight and showing corresponding icon on it.

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AT&T CU405 manual Backlight, External Display

CU405 specifications

The AT&T CU405 is a feature-rich mobile device designed to cater to a wide range of users, from beginners to more experienced smartphone enthusiasts. Positioned as a budget-friendly option, it incorporates a blend of practicality and essential technology that meets everyday communication needs.

At its core, the CU405 is built on a 4G LTE network, ensuring fast and reliable connectivity. This allows users to stream videos, browse the web, and engage in social media with minimal interruptions. The device is equipped with a 5-inch display, providing a clear and vibrant viewing experience. This size strikes a balance between usability and portability, making it comfortable to hold in one hand while still offering sufficient screen real estate for various applications.

One of the standout features of the CU405 is its impressive battery life. With a robust capacity, it ensures users can go through their day without constantly searching for an outlet. This is complemented by efficient power management features which help extend the battery's longevity even further.

The CU405 runs on Android, offering access to countless applications through the Google Play Store. This allows for the customization of the device according to personal preferences and needs. Users can download productivity apps, games, social media platforms, and more, making the CU405 a versatile companion.

In terms of imaging capabilities, the AT&T CU405 features a rear-facing camera that captures sharp photos and videos. While it may not boast the advanced photography features of high-end smartphones, it is perfectly suited for casual snapshots and video calling. Additionally, the front-facing camera enables users to engage in video chats with friends and family, enhancing connectivity.

Security is also prioritized in the CU405, featuring built-in protection mechanisms including options for secure lock screening and data encryption. This contributes to user peace of mind, knowing that personal information is safeguarded.

Overall, the AT&T CU405 is a solid choice for anyone seeking an affordable smartphone without sacrificing essential features. With its balance of performance, user-friendly design, and reliable connectivity, the CU405 stands out as a practical option for today’s mobile lifestyle.