[Stellar Bell Upgrade Launched on Testnet, Mainnet Voting Imminent] Jinse Finance reports that on November 4th, Stellar's Bell upgrade launched on the testnet, with mainnet voting to follow. This upgrade requires wallets and indexers to update their software to adapt to the network change. The upgrade also introduces optional post-quantum signature verification for smart contracts, which developers can enable as needed. The testnet launch signifies that the upgrade has entered the verification phase before the mainnet vote.