According to CoinMeta, Stellar has updated the upgrade guide for Bell (protocol 30), requiring wallets, exchanges, and infrastructure operators to update their software before the vote in November. protocol 30 involves new contract addresses starting with 'w', changes to the ledger header format, post-quantum signature verification, and millisecond-level ledger timestamps. Testnet validators will vote on November 3rd at 17:00, and the mainnet vote is scheduled for November 23rd at 17:00; the updates will take effect after approval.