Apple users facing bugs or slow speed on iOS 26 can switch back to iOS 18.6.2 for better performance. The downgrade process is possible but requires backups, downloading the correct IPSW file, and ...
I'm not seeing reports of iOS 26 installs going sideways, but I still always take these steps before making a major upgrade.
Note that simultaneous releases of iOS 18 and iOS 26 versions won’t continue indefinitely. Apple usually runs the two ...