Sony Mobile has begun to rollout the Android 7.0 Nougat firmware update for Xperia X (F5121), Xperia X Dual (F5122) and Xperia X Compact (F5321) handsets. The new update moves the build number to version 34.2.A.0.266.
The new firmware is currently live across select regions such as Australia, Latin America, Middle East, Russia, Turkey, Thailand and Vietnam. Expect availability to widen in the coming days.
Source: Xperia Blog