About W5 wallet version
As the TON blockchain has developed, new wallet versions have emerged to meet the needs of the ecosystem, with W5 being the latest version.
W5 supports transactions with up to 255 operations* simultaneously. For example, you can purchase several desired NFTs or list some items for sale in one transaction. Previous wallet versions only allowed a maximum of four nested operations.
You need to enable the corresponding setting in your wallet app to switch to W5**.
*currently, up to 100 actions are available when sending transactions.
**make sure your wallet app fully supports the W5 version. An example of such a wallet is the Tonkeeper mobile app for iOS and Android (you should update the app to the latest version).