Helium will migrate to the Solana blockchain on April 19, during which the network will be temporarily halted

ChainCatcher message, the decentralized wireless network Helium will stop network operations at 00:00 Beijing time on April 19. During the transition to Solana, Helium network coverage proof and data transmission will continue, but users will not be able to transfer tokens or interact with the Helium blockchain.

During this period, hotspot device owners or token holders do not need to take any action, and users can access their tokens at any time after the migration is complete. (Source link)