Now that XenINFO has been removed from JunesiPhone repo, follow these instructions:

Install with Filza:
  • Download and install Filza through cydia.
  • Download and install this DEB with Filza (https://www.patreon.com/file?h=37564869&i=5686217)
  • Then install the widget and you will not receive the error message.
Animal Crossing Amiibo's are NFC chip coins and give you the ability to invite any villager to your island without the forever hunt for them!

How To Use Amiibo's
Switch
You can tap your amiibo to the right Joy-Con controller's Right Stick or the Nintendo Switch Pro Controller’s NFC touchpoint.

Wii U!
Tap any amiibo accessory to the near-field communication (NFC) reader on your Wii U GamePad controller to score all kinds of bonuses in compatible games.

New Nintendo 2DS
Use amiibo with your New Nintendo 2DS! The New Nintendo 2DS XL and New Nintendo 3DS XL comes with built-in amiibo support. Just tap an amiibo to the NFC reader on the lower screen and go!

Nintendo 3DS
Use amiibo with your New Nintendo 3DS! You can also use amiibo with Nintendo 3DS, Nintendo 3DS XL or Nintendo 2DS systems via the Nintendo 3DS NFC Reader/Writer accessory.
  1. Make sure your iPhone (must be iPhone 7 or later) has the latest version of iOS on it.
  2. Go to the AppStore on your iPhone and get TestFlight installed; open it up to make sure it is ready.
  3. Click the TestFlight link that you got from Reddit on your iPhone, which should trigger your phone to open the install process for CattleGrid via TestFlight.
  4. Open CattleGrid app to make sure everything is good, it should have an empty center window and show an error saying you need the key file.
  5. There are likely a number of ways to get the needed files onto your phone, but steps 6-9 are the easiest way I found if you have a windows PC.
  6. Download and install iTunes to your PC.
  7. Download key_retail.bin and your amiibo's from NFCBank
  8. Open up iTunes with the iPhone connected via USB
  9. Use this guide to copy the bin files you want to the CattleGrid app on your phone.
  10. Do NOT put them in folders.
  11. Now you should be able to start up CattleGrid and see all the Amiibo files you added.
  12. To use the app, now loaded with the key file and Amiibo bin files, see this video