Some Verses Added

Not only have parts of the Quran been lost, but entire verses and chapters have been added to it.

For example, Ubai had several Suras in his manuscript of the Quran which Uthman omitted from his standardized text.

Thus there were Qurans in circulation before Uthman's text which had additional revelations from Muhammad that Uthman did not find or approve of, and thus he failed to place them in his text. KK