Windows 10 Mobile build 10557.1002

Windows 10 Mobile build 10557.1002 is an unconfirmed build of Windows 10 Mobile, which was supposedly uploaded to the Chinese website BetaWorld on 24 February 2019. It was claimed to be found on a prototype Microsoft Lumia 550 development kit.

Miscellaneous
MS Equipment-E1518230.png|MS Equipment E1518230 kit