Circle Internet Financial has announced an expansion of support for the USDC stablecoin on the Polygon PoS Amoy testnet, encouraging developers to migrate from the soon-to-be deprecated Polygon PoS Mumbai testnet. The transition is set to begin on March 27, 2024, with the launch of USDC, CCTP, and other Circle services on Amoy, and the subsequent deprecation of these services on Mumbai. Developers are advised to move to Amoy promptly to avoid disruptions, as Circle will no longer maintain Mumbai, resulting in potential data loss for users continuing to operate there. Circle aims to make money movement more accessible and efficient, fostering economic opportunity globally, and provides resources through their Discord community and developer documentation for those interested in building with USDC on the new testnet.