Simple Phone KYF38

The push notification function of the LINE application for this model is scheduled to be stopped.

For details, refer to "Notification regarding the stop of the push notification function of the LINE application for some models"(in Japanese only).

Easy to see and hear. Talk with everyone using the tabletop holder and built-in speaker.

Product Summary

  • Main camera effective pixels
    Approx. 8.00 million pixels
  • Battery Capacity
  • Size
    Approx. 51 x 115 x 17.9mm
  • Weight
    Approx. 140g
  • 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

  • TV
    Users can watch digital terrestrial broadcasting TV.

    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

  • Infrared Communications
    Infrared Communications
    Using infrared communication, users can send / receive phone numbers, pictures, data.

    Detail From here

  • 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.

Point 1

Easy to see, hear, and press. Comfortable usability.

Deka Pict

The standby screen displays the remaining battery, signal status, and more with large icons.

Deka Moji and Deka Clock

The text and clock are displayed in a large size. With the 3.4-inch high definition large screen, they are clearly displayed.

Deka Pict, Deka Moji and Deka Clock

Easy-to-understand menu

The menu structure uses large characters and is set up so that you can quickly find the function you want to use.

One-Touch Keys

Equipped with dedicated keys that allow you to register frequently used contacts and functions.

Easy-to-understand menu, One-Touch Keys

Audibility Adjustment

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

  • Soft

    Suppresses the high frequency range and reduces ear-piercing high pitched sounds. This option adjusts the sound leaving a soft and gentle impression.

  • Clear

    Emphasizes the high frequency range, which becomes harder to hear with age. This option makes children's voices and other sounds easier to hear.

  • Volume Limit

    Suppresses loud sounds while keeping the voice volume as-is.

Audibility Adjustment

Smart Sonic Receiver®

Smart Sonic Receiver®

This phone transmits sound from the entire screen making voice calls possible that feel like you are block surrounding noise by covering your ears. You can clearly hear your caller's voice, even in noisy environments.

Record Later

Record Later

Save the voice data of your most recent call when you end a call. Even if you forget what the call was about, this function allows you to listen to the content of an important call later.

  • Advance setting is required.
Point 2

Catch incoming calls and have lively conversations using the tabletop holder and built-in speaker.

Enjoy calls together with the whole family.

Minna de Tsuwa (high-volume speakerphone)

Minna de Tsuwa (high-volume speakerphone)

Place the phone in the included tabletop holder during the call to talk using the speakerphone. Enjoy conversations with the entire family or talk while engaging in another activity such as cooking.

Prevents “missed calls” even when set to manner mode.

Home mode (announces incoming calls with a loud sound)

Home mode (announces incoming calls with a loud sound)

Place the phone in the included tabletop holder to be notified of incoming calls with a loud sound even when the phone is set to manner mode. There’s no need to worry about missing important phone calls.

  • A standard AC adapter (sold separately) must be connected to use the dedicated tabletop holder.
Point 3

Protects against impacts*1, water, and dust for peace of mind even if it is dropped or gets wet*2.

Impact resistance*1

This mobile phone is hard to break even if you should drop, so you can continue to use without worry.

Waterproof and dustproof*2

This mobile phone offers reliable use even when it gets wet or dirty from dust and dirt during use.

Protects against impacts*1, water, and dust for peace of mind even if it is dropped or gets wet*2.
  1. A drop 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 against every shock.
  2. IPX5/IPX8 water resistance, IP5X dust resistance. Be sure the battery cover is firmly in place.


  • Google Play Store™ and Gmail™ are not available.
  • EZweb site and EZ apps are not available.
  • EZ services used with your previous feature phone cannot be used. Cancellation of subscriptions to these services is the responsibility of the user.
  • 3G communication is not available on this model.
  • All screen depictions are simulated images. Actual screens may differ.

Recommend Information

  • By phoneOpen 9:00 – 20:00

    • English

      0120-959-472(Toll Free)

    • Portuguese

      0120-959-473(Toll Free)

    • Chinese

      0120-959-476(Toll Free)

    • Korean

      0120-959-478(Toll Free)

    • Tagalog

      0120-933-952(Toll Free)

    • Vietnamese

      0120-933-961(Toll Free)

    • Japanese
      about au mobile services

      157(Toll Free)from au phones

      0077-7-111(Toll Free)

      about Internet services
      Contract / Fee / Billing

      0077-7084(Toll Free)

      Connection setting / failure

      0077-777(Toll Free)