OnePlus started rolling out Oxygen OS v2.2.1 OTA update for the OnePlus X smartphone This update fixes several bugs, includes GMS 3.0 upgrade and general bug fixes and optimizations.
Fix for data leak while roaming experienced in some regions
Fix for microphone being muted when using Google Hangouts
Fix for app drawer not launching when google search bar is hidden
GMS 3.0 upgrade
APN update to support Tigo carrier
Security patch update
General bug fixes and optimizations
OxygenOS 2.2.1 OTA (over-the-air) update for the OnePlus X is 248MB in size and also includes Google security patch for March. It is gradually rolling out for the users globally.