> For the complete documentation index, see [llms.txt](https://support.keyst.one/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.keyst.one/changelog/keystone-changelog/m-6.4-multi-coin.md).

# M-6.4 (Multi-Coin)

The multi-coin firmware M-6.4 includes the following updates:

* New features: Keystone Hardware Wallet now supports showing your Solana NFT on the lock screen. ([Tutorial](/advanced-features/show-nft-on-lock-screen.md))
* Performance improvements: \
  1\) \[MM / DeFi / Web3] has been renamed to \[MM / Rabby /DeFi]\
  2\) \[Solflare / Slope] has been renamed to \[Solflare]\
  3\) Correct some contents in Traditional-Chinese language version\
  4\) Correct some titles in decoding 4-byte function signature page
* Bug fixed: \
  1\) Fixed the bug on the Keystone hardware wallet when scanning the receive QR code of LTC on the Keystone Companion APP.

Tutorial for firmware upgrade:

{% content-ref url="/pages/-MVz-o9g8Dc-vlyVuAZj" %}
[Firmware Upgrade](/getting-started/firmware-upgrading.md)
{% endcontent-ref %}