Before searching for external IPAs, try the official "last compatible version" feature provided by Apple. This is often the safest way to get a "full" functional version without third-party files.
Finding a reliable IPA (iPhone Application Archive) for this specific firmware requires looking at trusted community archives: messenger ipa ios 935 full
: Sites like Bitrise analyze various IPA versions, though they often focus on more recent releases. Before searching for external IPAs, try the official