Apple today seeded the first beta of an upcoming iOS 9.2.1 update to its public beta testers, with the software being made available just a day after the first developer beta of iOS 9.2.1 launched. The iOS 9.2.1 beta comes a week and a half after the public release of iOS 9.2, the second major update to iOS 9.

Beta testers who have signed up for Apple's beta testing program will receive the iOS 9.2.1 update over-the-air after installing the proper certificates.

Those who want to be a part of Apple's beta testing program can sign up to participate on the company's beta testing website, which gives users access to both iOS and OS X betas.

The first developer beta of iOS 9.2.1 revealed no significant outward-facing changes, suggesting iOS 9.2.1 is a minor update that will focus on under-the-hood performance improvements and bug fixes to address issues discovered since the release of iOS 9.2.