Qua phone QX

Comfortable calling and durability*. Domestic quality that gives peace of mind for long-term use.

  • IPX5/IPX8 waterproof and IP5X dustproof performance. Be sure the caps are securely fastened when using. A shock test was conducted in which the product was dropped in 26 different orientations onto plywood (lauan) from a height of 1.22m. This test is compliant with MIL-STD-810G Method 516.7-Shock Procedure IV, which is established by the U.S Department of Defense. There is no guarantee of being impervious to damages.

Product Summary

  • Display Size
    Approx. 5.0 inches
  • Main camera effective pixels
    Approx. 13.00 million pixels
  • Battery Capacity
  • Internal memory capacity (RAM/ROM)
  • Size
    Approx. 73 x 146 x 8.9mm
  • Weight
    Approx. 139g
  • Wi-Fi
  • OS
    Android™ 7.1
  • au 5G
    au 5G
    5G is the fifth generation mobile communication system that is the next generation of LTE-Advanced. In addition to high-speed, high-capacity, mulit-connectivity, and low-latency (real-time), 5G is expected to meet a wide range of needs from the devices that people carry every day to the realm of IoT.
  • 4G LTE
    4G LTE
    We provide an ultra high-speed communication services with a maximum receiving speed of 75 Mbps that is easy to connect to with a 99% population coverage rate (800 MHz). * The maximum receiving speed differs depending on the model and area.
  • au VoLTE
    au VoLTE
    Allows you to use clearer voice calls compared to 3G.

    Detail From here

  • Water proof
    Water proof
    Mobile phones durable to water.
  • Osaifu-Keitai®
    Turn the phone into e-money, a train ticket, or a point card. This convenient service lets you use the phone for various situations just by touching it to a reader.

    Detail From here

  • au World Service
    au World Service
    Service for using current au cellphone and number overseas.

    Detail From here

  • Hi-Res
    Playback music with sound quality higher than that of music CDs.
  • Emergency Rapid Mail
    Emergency Rapid Mail
    Emergency news service for earthquakes, tsunami or other disasters and their evacuation sites announced by the National Weather Service, national and local governments. *Some cellphones will only receive emergency earthquake news.

Product Video

(in Japanese Only)

point 1

A comfortable calling feature with superior operations and clear sound

Hear your caller more clearly


No need to worry about where to press your ear

Original technology transmits the caller’s voice by vibrating the entire display. There is no need to worry about which part of the smartphone your ear should be pressed against when you talk. You will have clear sound even in noisy locations.

Audibility Adjustment

Soft Clear Loudness Control

When it is difficult to hear the caller’s voice, the sound quality can be adjusted.

  • When Audibility Adjustment is not used, the standard sound quality setting, which achieves an overall balanced sound, is applied.

Calls are easy to notice

Calls are easy to notice

If you receive 2 or more missed calls from the same person within 10 minutes, the ringtone gradually gets louder, and vibrations gradually get longer. Even when you do not notice, you are notified again in a timely manner.

  • Applies only to your preset phone app.

Easy-to-understand display

Easy-to-understand display

When receiving or making a call, functions that are hidden in the menu are displayed by buttons on the screen.

In the call history, you are easily notified of any missed calls or voicemails using icons.

point 2

Reliable durability provides continued use for a long time *1

When it’s dropped

When it’s dropped

Impact resistance *2

This smartphone has a construction that is strong against impact and difficult to damage, with a display employing the powerful glass Dragontrail®X. You can feel safe even when the smartphone is accidentally dropped.

When it gets wet

When it gets wet

Water resistance and Dust resistance *1

No need to worry, whether you are visited by sudden rain, around wet areas in the kitchen, or your device gets covered in dirt or dust. Dirt can be lightly washed off.

In summer or in winter

In summer or in winter

Temperature/vibration resistance *2

This smarphone is strong against outdoor environments with severe temperatures, such as the seashore in summer or snowy mountains in winter, and can even handle intense shaking. It is tough in various outdoor situations.

  1. IPX5/IPX8 water resistance, IP5X dust resistance. Make sure that the caps are securely attached. Do not expose or immerse the device in anything other than room temperature tap water. This includes alcohol and other liquids. Do not expose or immerse the device in hot water. This device is not designed with resistance to heat. Do not use the device when directly exposed to heavy rain.
  2. Durability tests conducted in compliance with 6 test standards of the US Department of Defense (MIL-STD-810G) [a shock test in which the product was dropped in 26 different orientations onto plywood (lauan) from a height of approx. 1.22 m, a vibration test in which the product was vibrated for 3 hours (1 hour each for 3 orientations at 20 to 2,000 Hz), a high temperature test in which the device withheld an operating environment of 50℃ for 3 consecutive hours and a storage environment of 60℃ for 4 consecutive hours, and a low temperature test in which the device withheld an operating environment of -21℃ for 3 consecutive hours and a storage environment of -30℃ for 4 consecutive hours]. The performance of this product is checked under the conditions of the testing environment and does not constitute a guarantee for operation for every condition of actual use. Also, there is no guarantee of being impervious to damages or malfunctions.
point 3

From planning to production, the Japanese quality gives peace of mind

For anyone

For anyone

Domestic quality

We provide products that focus on each and every detail so that anyone can use them with peace of mind.



  • For Internet connection, a separate subscription to LTE Net Course is required.
  • Available only with an au Nano IC Card 04.
  • au VoLTE is a voice call service that is available for devices that support VoLTE within the au 4G LTE area.
  • When connecting with other devices that support au VoLTE (within au's 4G LTE area), voice calls with high-quality sound are enabled. In other situations, a conventional level of sound quality is enabled for voice calls.
  • Devices that support au VoLTE are not able to use 3G communications in Japan.
  • Note on high-quality sound The actual voice sound quality may vary depending on the communication environment and network traffic conditions.
  • EZweb service and EZ apps are not available. When you switch from the current mobile phone contracted under the EZ WIN Course to a new one, note that your subscription to EZweb service, EZweb site, e-mail newsletters, and Machi-Uta is not automatically terminated or canceled. To cancel or unsubscribe from these services, please follow the necessary procedures.
  • Some smartphone applications may perform data communications even when the user does not operate the device. Subscription to a fixed rate packet (data) communication service is recommended. Some apps installed from the Internet may pose a security risk, just like with personal computers. For example, smartphone operations could become unstable due to attacks by malicious hackers, or the device could be taken over and used in illicit activities. Accordingly, make sure that the provider of the app is reliable and thoroughly check the operating conditions before use. Please note that apps installed by yourself and any malfunctions arising from them are not covered by the warranty. KDDI is not responsible for any trouble resulting from the installation of apps.
  • All screen depictions are simulated images. Actual screens may differ.
  • Please note that the specifications and other details are subject to change without prior notice.

Recommend Information

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