# 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](https://support.keyst.one/advanced-features/show-nft-on-lock-screen))
* 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="../../getting-started/firmware-upgrading" %}
[firmware-upgrading](https://support.keyst.one/getting-started/firmware-upgrading)
{% endcontent-ref %}