The screenshot sent in is supposedly that of an internal document used by UK carrier Three. The document, if legit, shows that the Galaxy Note 3 has been pegged for a 16th of September release, and the Xperia Z1 pegged for a release on the 24th of September. The document has noted that neither device has been officially announced yet, so perhaps these dates could be subject to change. We’re not sure if Three will be the first carrier to launch these devices, but assuming their dates are accurate, it could be safe to assume that the September time frame is when either device will be launched, although dates may vary depending on your country.
In any case take it with a grain of salt for now, but check back with us on the 4th of September for the details.