Ya tenemos el changelog de la 5.1.30

CHANGELOG

[Lockscreen, Status Bar, Notification Bar]
Fix - Incorrect USB OTG/GPS icons in Notification shade (01-26)
Fix - Screen flashed white when changing system language (01-26)
Fix - Logic error when setting SIM card PIN code (01-26)
Fix - Could not launch bluetooth app when using it to unlock screen (01-29)

[Home screen]
New - Support exiting recents page by pressing empty area (01-28)
Optimization - Set one-handed mode default screen size to 4.0 inches (01-29)
Fix - Sometimes, setting wallpaper caused crash (01-27)

Email
New - Support searching for mails by sender/recipient/subject in mail searching result page (01-28)

[Clock / Calculator]
New - Added 'Sort by name' and 'Sort by time' options in Add clock page (01-27)