mamorino4 Specifications & Services


Consult with your child's school in advance before your child takes the device into school.

Brand name ZTE Corporation

Basic Specifications
Size Approx. 56 × 99 × 15.5mm
Weight Approx. 105g
Battery Capacity 1,200mAh
Continuous Call Time
(Voice Call Time / When used within Japan)
Approx. 530 minutes
Continuous Standby Time
(When used within Japan)
4G LTE area : Approx. 300 hours
Charge Time Common AC adapter 05 : Approx. 140 minutes
Battery removal YES
External memory
(Maximum storage capacity of compatible cards)
Internal Memory Capacity (RAM) *3 512MB
Internal Memory Capacity (ROM) *3 4GB
Number of Addresses Registered in Address Book 50 [1]
Number of saved messages (SMS) Maximum 500 [1]
Number of registered templates Maximum 30 [1]
Display Type TFT
Display Size Approx. 2.8 inches
Maximum Number of Colors Displayable on LCD Approx. 26 million colors
Waterproof *4 IPX5 / IPX7 [2]
Dustproof *4 IP5X [3]
au IC Card au Nano IC Card 04 LE [4]
Biometric authentication -

  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.
  3. The entire memory capacity cannot be used to save apps and data.
  4. Be sure the card slot cover and caps on devices with these are securely fastened and the battery cover on devices with a removable battery cover is firmly in place.
    Do not immerse the unit in ocean, pool, or hot spring water. Do not place the unit on the sand.

  1. The number of entries depends on the amount of free space in the device memory.
  2. IPX5 rating: The unit will retain its functionality as a phone even if blasted with water projected at all angles through 6.3 mm nozzles at a flow rate of approximately 12.5 liters per minute for more than 3 minutes from a distance of approximately 3 meters. IPX7 rating: Water will not leak inside and the unit will retain its functionality as a phone even if it is gently immersed in a tank of still tap water at room temperature at a depth of 1 meters and placed on the bottom for approximately 30 minutes.
  3. IP5X rating: When the unit is churned for 8 hours inside a dust resistance testing tube, the unit maintains its functionality and safety even when test dust (a diameter of 75 µm or less) enters the unit.
  4. mamorino4 does not support the SIM unlocking.

    Click here for details about SIM cards and SIM unlocking (in Japanese only)

au VoLTE YES [5]
Maximum communication speed
Downlink : Max / Uplink : Max (Mbps)
Sending and receiving speed up to 128 kbps when subscribed to Junior Feature Phone Plan [6] [7]
Bluetooth® Ver.4.0
Infrared Communications -

  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 connecting with other devices that support au VoLTE (within the au 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.
    au VoLTE models do not support 3G communications in Japan.
  2. 3G communication is not available with this model.
  3. When other price plan applied: maximum receiving speed 75Mbps / maximum sending speed 25Mbps

  • 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.
Wireless charging -
Security Buzzer YES
Bilingual Function -
au World Service -
Osaifu-Keitai® -
Emergency Rapid Mail YES
+ Message *6 -
SMS (c-mail) YES
au Mail -

  1. To use +message, update of the SMS app may be required. Click the link below for more information.

    + Message (in Japanese only)

* Product specifications may change without notice.

Bundled items Tool for removing the battery cover (Sample) , Screw for battery cover (Sample)

  • Separate purchase of a dedicated AC adapter or common AC adapter is required for charging.

Specific Absorption Rate (SAR) of Electrical Waves : HEAD 0.91W/kg
Specific Absorption Rate (SAR) of Electrical Waves : BODY 0.95W/kg

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

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)