arrows Be F-04K

docomo Smartphone

arrows Be F-04K

Capture night views. Convey the excitement. Distinctive made in Japan smartphone.

Released on May 25, 2018
On sale now

New generation, New phones.New generation, New Japanese only

Features of arrows Be F-04K

Easy and beautiful image capturing for everyone using single-lens reflex technology.

Image picture: User-friendly simple design.

The simple camera screen eliminates difficult operations such as mode adjustments, allowing easy and authentic image capturing for everyone.

Crack-resistant screen*1 designed for reliable continuous use.

Image picture: New tougher smartphone.

The uniquely designed crack-resistant structure passed a self-developed drop test on concrete in 26 directions from 1.5 m height.*1

Reliable and user-friendly made in Japan model made without compromise.

Image picture: A washable smartphone is always clean.

Smartphones should always be clean as they are used every day. This model can be kept clean because you can wash it with foaming hand soap*2 like washing your hands when you get home.

For more detailed features (in Japanese only)

Specifications and Services/Functions



Approx. 5.0 inches

Battery capacity

2580 mAh
(Internal Battery)

RAM/ROM Internal memory


Camera effective pixels

Rear camera
Approx. 12.2 megapixels

Front camera
Approx. 5 megapixels

LTE Data rates

150 Mbps for receiving *3

50 Mbps for sending *3


Approx. 144 x 72 x 8.3 mm


Approx. 146 gnanoUIM

Main services/functions

Waterproof/dustproof IPX5/8 IP6X★1
"Osaifu-Keitai" NFC (equipped with FeliCa) (in Japanese only)
Biometric authentication (in Japanese only)
Not compatible with Wireless charging

CompatibleNot compatible

  1. IPX5/8 waterproof performance. Please make sure that the rear cover is firmly closed before use. It is recommended to replace parts once every two years, regardless of whether or not there is an abnormality, to ensure the waterproof performance is maintained (charges will apply).
    IPX5 means that the mobile phone has the function as a communications device after 12.5 liter of water per minute is sprayed at the phone from all directions at a distance of approximately 3 m for at least three minutes using a water spray nozzle with an internal diameter of 6.3 mm.
    IPX8 means that the mobile phone has the function as a communications device after it is submerged under tap water at room temperature at a depth of 1.5 m, then left for approximately 30 minutes, and then taken out of the water.
    IP6X dustproof performance. IP6X refers to a protection level and means that the phone has the function to prevent dust particles from entering the inside of the phone after it is placed in equipment with an atmosphere containing dust particles with a diameter of 75 µm or less and agitated for eight hours and then taken out of the equipment.
  2. Recording is not supported.
  3. High-resolution headset and speakers (sold separately) are required.
  1. The device passed a drop test on concrete in 26 directions from 1.5 m height to confirm that the screen does not crack (As of March 2018. According to Fujitsu Connected Technologies). Please note that this test result provides no guarantees regarding malfunction or damage to the device.
  2. Please note that we make no guarantees regarding malfunction of the device. Rinse the device thoroughly with tap water to remove the remaining foam. Do not charge the device when it is wet. For details, please visit the New windowF-04K product website (in Japanese only).
  3. The data rate is the maximum value of the technical specification when sending and receiving and does not represent the actual data rate. Communications are provided on a best-effort basis and actual data rates may differ depending on the communications environment and network congestion.
    Please see Search Service Area for details on the compatible service areas.
  • The price is open. For more information, please contact a docomo Shop or other retailer.
  • Please check availability with a docomo Shop or other retailer beforehand.
  • Product and screen images are for illustrative purposes only, and may slightly differ from the actual products.
  • The battery cannot be removed. The smartphone needs to be sent to the repair counter for battery replacement.
  • Android is a trademark of Google LLC.
  • Wi-Fi is either a trademark or registered trademark of Wi-Fi Alliance.
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