Just about an hour ago some devices started to show available update. Patch is targeted only for some models of iPhones 5s and 5c (presenting themselves as 5,4 and 6,2), model numbers:
iPhone 5s
A1457 (UK/Europe)
A1528 (China)
A1530 (Asia Pacific)
iPhone 5c
A1507 (UK/Europe)
A1526 (China)
A1529 (Asia Pacific)
The only thing included is correction for network provisioning.