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Kyocera KYF31 Gratina 4G WiFi Keitai Tough Android Flip Phone Unlocked

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  • Kyocera KYF31 Gratina 4G Keitai
  • Kyocera KYF31 Gratina 4G Keitai
  • Kyocera KYF31 Gratina 4G Keitai
  • Kyocera KYF31 Gratina 4G Keitai Color Choices
  • Kyocera KYF31 Gratina 4G Keitai Keypad
  • Image 6
  • Kyocera KYF31 Gratina 4G Keitai Sub-Display
  • Kyocera KYF31 Gratina 4G Keitai Waterproof
  • Kyocera KYF31 Gratina 4G Keitai Shockproof
  • Kyocera KYF31 Gratina 4G Keitai Touch-cruizer
  • Kyocera KYF31 Gratina 4G Keitai Touch Pointer Turn on
  • Kyocera KYF31 Gratina 4G Keitai
  • Kyocera KYF31 Gratina 4G Keitai
  • Kyocera KYF31 Gratina 4G Keitai Green
  • Kyocera KYF31 Gratina 4G Keitai White
  • Kyocera KYF31 Gratina 4G Keitai Black
  • Kyocera KYF31 Gratina 4G Keitai Pink
130.00 Grams
Requires 3-4 business days to Ship
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 Product Description

Please Note !

  • This is for a SIM-UNLOCKED Kyocera KYF31 Gratina 4G Keitai Android Flip Phone
  • Flip phone running off a base version of Android 5.1.1 Lollipop
  • Cellular Internet / Data connection through simcard will work on this phone (Simcard Data or WiFi connection)
  • Can install Android Apps (apk)
  • We can put an App market on the phone, or you can install app by PC connection
  • We are happy to guide our customers on how to install apps after they receive the phone.
  • Also, if customers need us to install a few apps before shipping, we are happy to pre-install for you (no extra charge)

Main Specifications

  • AU KDDI Kyocera KYF31 Gratina 4G Keitai Android Flip Phone
  • This is the Flip phone running a base version of Android 5.1.1 Lollipop OS
  • Still using the traditional styling of Japanese flip phone, the core is running Android
  • The KYF31 has a traditional simple to use round flip phone design.
  • Rounded corners, smooth body, simple and great!
  • This phone has the MIL Military Grade shockproofing, Waterproofing, and Dustproofing
  • Front sub-display blends seemlessly in with the phone body
  • Using the Flip Phone touch-cruiser pointer
  • Scroll up and down by moving your finger over the keypad
  • Shrink or Enlarge on the screen just like you would on a standard smartphone.
  • 8.0 Megapixel HD Camera (3264 x 2468 pixels max picture taking resolution)
  • HD video Recording (1280 x 720 video capture resolution)
  • Multiple camera / picture taking modes and framings
  • HDR Supported
  • Android 5.1.1 OS (base)
  • This Japanese phone is Waterproof / Dustproof in compliance with IPX5/IPX8 standards
  • Also has the Military Grade Shockproof to help protect from drops / falls (MIL-STD-810G Method 516.7:Shock-Procedure IV)
  • Bilingual phone (can be changed from Japanese to English and vice versa) (We set all phones to ENGLISH before shipping)
  • Please Note : This phone uses a Nano-Simcard (the smaller size simcard, like on the iphone 6). If you do not have a nano-simcard, you will need to contact your cellular company and exchange your simcard for a Nano-Simcard

Other Specifications 

  • CPU: Qualcomm Snapdragon 210 (MSM8909) Quad-core 1.1GHz
  • GPU: Adreno 304
  • Memory : 8 GB ROM / 1 GB RAM
  • 2G Network : GSM EDGE 850, 900, 1800, 1900 MHz
  • 3G Network : UMTS HSDPA UMTS 850, 1900, 2100 MHz
  • 4G Network : FDD-LTE 700, 850, 1800 (Band 3, 17, 26)
  • 4G Network : TD-LTE 2500 (Band 41)
  • Micro SD memory card supports up to 32 gigs
  • Battery Size : 1500 mAh
  • Main Display : 3.4 Inch qHD FWVGA TFT Display (854 x 480 pixels) 
  • Sub Display : 1.0 Inch screen (128 x 36 pixels)
  • Bluetooth version 4.1
  • WiFi 802.11 b/g/n
  • NFC
  • Micro-USB Interface / Port
  • Music Format : MP3, AAC, AAC+, eAAC+, AMR, QCELP, WAV
  • Size : 113 x 51 x 16.7mm
  • Simcard Size : Nano


  • Kyocera KYF31 Gratina 4G Keitai Android Flip Phone x 1
  • Battery x 1
  • Rear Battery cover x 1
  • AC Adapter Charger x 1
  • Box & Manual x 1



 Product Videos

auの4Gガラケー「GRATINA 4G」を触ってみた
  • auの4Gガラケー「GRATINA 4G」を触ってみた
    http://buzzap.jp/news/20160112-gratina-4g-au-2016-spring/ LINE...
  • auの4Gガラケー「GRATINA 4G」のタッチポインター #KDDI
    http://buzzap.jp/news/20160112-gratina-4g-au-2016-spring/ LINE...

 Product Reviews

Previous | Showing reviews 5-8 of 22 | Next


    Posted by Gene G Michals on 16th Sep 2020

    We ordered this phone to use in the US on the GSM network. The phone works great and is perfect for our situation.
    I want to thank Kazuto Tominaga for his excellent customer service and recommendations. He was very patient and knowledgeable about which phone should work best for our needs. We would order again in the future. Thanks.

  2. Great Phone, A+ Customer Service

    Posted by Phil on 12th May 2020

    Firstly. I just want to say Kazuto's customer service is first rate. By far the best experience I ever had buying a phone online. Throughout the process Kazuto’s communication was amazing, he let me know what was going on throughout the process and sorted out shipping arrangements during the COVID-19 situation. A Very pleasant and patient person and always offering the best advice.

    As for the phone, the Gratina 4G is excellent. Being android, I was able to sideload all the apps I needed and even a T9 keypad input app. It works well connected to Wi-Fi and the touchpad is very easy to browse the web with. It works properly on the 850mhz (band 5) and 2100mhz (band 1) 3G bands here in New Zealand.

    Can’t wait to buy my next flip phone from Kyoex.

  3. Great phone and fantastic service!

    Posted by Marlina on 18th Jan 2020

    I bought the Gratina 4G as my secondary phone for the basic functions of calling and texting. However I was pleasantly surprised and impressed that is has a great camera, good battery life and WiFi connectivity which enables me to surf the web and have access to basic apps like Whatsapp and Instagram. Although the phone does not have a touch screen, it has a cool feature called the touch cruiser pointer which allows the user to scroll up and down the screen using the finger over the keypad. Although I would like to continue raving about the phone, more importantly though I would like to share my pleasant experience of dealing with Mr Kazuto Tominaga who was very pleasant, friendly, and extremely helpful and responsive to all my queries right from Day One. He in fact helped me choose this model as I had some other models in mind which did not have WiFi connectivity (he helped highlight this to me as I was unaware of it).  He was in constant contact with me throughout the whole process, right up till the point that I received the phone. After that, I had some questions about the phone's features and he provided excellent after sales service by helping me solve my problems. I strongly recommend KYOEX to anyone who would love to own a Japanese flip phone. Thank you very much Mr Tominaga for all your help and support! 

  4. Gratina breathes new life into the neglected niche of flip phones & shows that they can still thrive in the age of 'App for that.'

    Posted by Zachary on 29th Apr 2019

    I bought this with the intent to replace the old flip phone I had been using. It was working fine, but being stuck on English & Spanish as my only language options along with a lack of customization beyond caller tones, no app store, & a very weak camera had me search for a phone that offered Japanese, more customization, and was generally better. If you're like me, I've never been a fan of smartphones as they lack what I love about flip phones: Buttons & the clam-shell design. Alas, most stores these days are lucky to offer any flip phones for sale, let alone any that had Japanese.
    Since the purchase, I have been satisfied with what it can do. It's customization reaches beyond caller tones (Alerts & SMS tones), manner/silent mode is just the push of a button, and it more importantly offers Japanese as a language option. I am able to make calls & receive SMS (I use it in the US & my carrier is T-Mobile.) The pointer feature takes some time to learn, but I've gotten used to it. All in all, things work like a charm (although you may have to manually input settings such as the APN network for your carrier & have a SMS app installed before sending messages.)
    So why is this review rated 4 stars then? Well unlike my old phone this one does not have a headphone jack, so if you want to listen to your media in peace you're out of luck unless you have one of those USB headphones. Regardless of what phone manufacturers say, I find headphone jacks to be integral. There are also some features that only work in Japan, but they aren't too big of a deal. Also if you plan on playing games on this device, your library is likely going to be limited to what doesn't require quick reflexes or rely on touch screens, again I don't think it's too much of a big deal as long as you don't mind playing simple titles like Snake.
    Overall, this device offers the best of both worlds by fulfilling the niche of flip phones & having enough smart phone functionality that doesn't teeter the user towards smartphone addiction due to the sacrifice of touch screen convenience.
    Beyond the device itself, I was provided excellent service from Mr. Tominaga as he helped me navigate into the world of Japanese phones & provided me useful information that I couldn't find on the web.

Previous | Showing reviews 5-8 of 22 | Next

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