A week ago, we saw the first beta of iOS 10.2.1 land for both developers and public beta testers. Now, the next build of the future software update for iPhone, iPad, and iPod touch has begun rolling out to the same parties with additional bug fixes and stability improvements to get the update ready for a public launch likely sometime in January.
To install the latest iOS 10.2.1 beta on your registered device, head over to Settings > General > Software Update. Tap “Download and install” next to the iOS 10.2.1 Beta 2 listing and you’ll be good to go. I recommend jumping on a Wi-Fi network first alongside plugging in your device beforehand as a) you don’t want data overcharges on your bill and b) you don’t want your phone or tablet to die during the installation process.