Speed Wi-Fi NEXT W04 Specifications & Services

Basic Specifications
Size Approx. 130 x 53 x 14.2mm
Weight Approx. 140g
Continuous Call Time *1 Default Mode : Approx. 540 minutes
Continuous Standby Time
(When used within Japan)
Default Mode : Approx. 850 hours
Charge Time Approx. 120 minutes [1]
Battery Capacity 2,750mAh
External memory
(Maximum storage capacity of compatible cards)
Display Type TFT LCD
Display Size Approx. 2.4 inches
au IC Card au Micro IC Card (LTE)

  1. The continuous call time and continuous standby time listed are average time lengths for usage from combined moving and fixed locations with normal signal reception. The actual times for which the phone can be used will vary widely depending on a variety of conditions, including calling time, number of calls, email composing time, number of sent and received emails, usage conditions of Internet and applications, and network conditions. (More frequent usage or poor signal reception shortens these times. Less frequent usage extends the times.)
  2. This figure has been confirmed through the operation test following KDDI's standard. With some models, copyrighted data that can be stored in external storage is transferable to secured external memories. However, note that the availability varies depending on the manufacturers: some microSD™ cards, microSDHC™ cards and microSDXC™ cards even with the above-mentioned specifications may be unsupported.

  1. Measured with a common type-C adapter 01
800MHz / 2GHz YES / YES
Carrier Aggregation YES
4G LTE Send Recieve Speed *3 758 / 37.5 [2] [3] [4] [5]
WiMAX 2+
Downlink: Max / Uplink: Max (Mbps)
558 / 30 [6]

  1. Maximum transmission speed differs depending on the service area and communication standards. For details, please see the service area map.

    Service area (in Japanese only)

  1. When using high speed plus area mode (pay service).
  2. 758 Mbps is available when high-performance mode is enabled. Provided in some areas of Tokyo metropolitan, Chukyo and Keihanshin areas. Please use with the latest software.
  3. Not applicable to areas that support the maximum receiving speed of 300 Mbps.
  4. 37.5 Mbps is available (in some areas of the prefectures) throughout Japan.
  5. 558 Mbps is available when high-performance mode is enabled. Provided in some areas of Tokyo metropolitan, Chukyo and Keihanshin areas. Please use with the latest software.

  • Each of the above communication speeds is a best-effort service. Note that the maximum communication speed is not the actual communication speed, but the maximum value based on the technical standards. The actual speed may fall substantially short of the maximum for various reasons including customer's communication environment and traffic conditions.
au World Service YES (LTE / UMTS)
Bluetooth® Ver.4.1
Wi-Fi standard IEEE802.11a/b/g/n/ac (LAN)
Interface USB 3.0
External connection USB Type C
Max. Number of Connections Wi-Fi : 10 devices
Bluetooth : 3 devices
Supported OS (Japanese Version) Windows® 7 / 8.1 / 10
Mac OS X v10.6 / v10.7 / v10.8 / v10.9 / v10.10 / v10.11 / v10.12
Easy connection WPS, QR Code, NFC

  1. OSs that are no longer supported by Microsoft as of April 2017 are not eligible.

* Product specifications may change without notice.

Bundled items USB 3.0 Type C to A cable (sample)

  • Requires purchase of a separate common type-C adapter 01 or conversion adapter.

Specific Absorption Rate (SAR) of Electrical Waves : BODY 0.553W/Kg

For details about the Specific Absorption Rate (SAR) of au phone (in Japanese only)

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