Update: OK, now we're hearing from some readers that the new build of 9.3 has not been released. At this time, we just recommend that those of you with the iPhone 5s and earlier or iPad Air and earlier wait until further notice before attempting to update to the new OS. We apologize for the confusion.
No sooner had we told you about Apple pulling the iOS 9.3 updater for older iPhones and iPads than the company released a new build -- 13E236 -- for the affected devices.
The new build is only for the older devices -- the iPhone 5s and earlier, and iPad Air and earlier -- that had issues with the iOS 9.3 update in some cases. If you successfully installed the update earlier this week even on older devices, you won't need to update to the new build.
If you did have issues, you'll need to install the new build of iOS 9.3 through iTunes -- it cannot be installed via an OTA (over the air) update. To do this, make sure that you have a recent iTunes backup, and then launch iTunes on your Mac or Windows PC. Connect your iOS device to your computer using a USB to Lightning or USB to 30-pin Dock cable, then click the device icon (looks like an iPhone) in the upper left of iTunes to view the device tab.
Next, click Check for Update in the device summary pane, then click on Download and Update. Agree to Apple's Terms and Conditions, enter the passcode on your device if prompted, and then click Continue to begin the update.