Every build we've published, kept online on purpose. If a new release misbehaves on your phone, roll back to one that worked.
Try just the number — for example 10 instead of v10.3.
Older versions are kept here for people whose device or connection struggles with the newest one. They do not receive fixes, and an old build can stop working once the platform changes on its end.
If you don't have a specific reason to go back, install the latest release instead — and on a low-RAM phone, Honista Lite is the better answer than an old build.
Four things worth knowing before you roll back.
Uninstall the version you have first — Android will not install an older build over a newer one. Then download the file from this page, allow installs from your browser or file manager, and open it.
No. Your chats live on the server, so they come back when you sign in. Local settings such as your theme and font choice reset, and you will set those again once.
That build is listed for reference but its file is still being uploaded. It will become a working download as soon as the upload finishes — the page updates on its own.
For a short while, yes. Long term it isn't ideal — old builds miss compatibility fixes and eventually break when the platform changes. Treat a downgrade as a temporary fix, not a permanent setup.