PS VITA Region quastion?

I have a question ,maybe its sound stupid but here it go....

Is there any region control for games or downloaded games? Can I play and download games with UK PSN account to US version PS VITA? And Can I buy games in UK and play them on US PS VITA? Or its same like for PS4, that there is region free?

The VITA is full region free, the only thing that is region locked is the DLC for the games (If you buy a game in US you need the US DLC)

Still keep in mind that Vita can only be tied to one PSN profile at a time. So as soon as you link a profile into it you can only access that profile's marketplace region.

No region locks on any existing physical Vita game. DLC compatibility is the only catch, as @Warlord_Irochi said.

For digital purchases, see this guide:
http://kotaku.com/5983578/how-to-play-japanese-vita-games-on-your-non-japanese-vita