How do I revert to a previous iOS version from iOS 26 without losing data?

mohmmad174 wrote:

I want to get back my old update, but I don't know how. Also, will my data be deleted?

ios 26 hasn't been released to the public yet.

If you had a backup on previous public software which was not overridden, or an archive of a backup on your computer, then you should be able to safely restore your data. To downgrade to previous public software, you'll need to connect your iPhone to a computer and put it into Recovery Mode then Restore, that will re-install the public software.

How to uninstall iOS or iPadOS beta software - Apple Support

Here you go:

Apple Beta — Unenroll Your Devices

Yes, your phone will be wiped and all data lost if you did not perform a backup first. Hopefully it was a computer backup, since iCloud backups are overwritten.

Try reading the information provided to you when you joined the beta program.

mohmmad174 wrote:

When is the official release of the update?

The official release of iOS 26 won't be until the fall. It will be in beta testing for next few months.