> For the complete documentation index, see [llms.txt](https://guide.0f33.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.0f33.com/topping-up-your-card.md).

# Topping up your card

1. IOS\
   You need to make sure you have a companion App
2. Android\
   Make sure you have enabled NFC on your device