I think it is like your phone and depends on your plan
Sony
Sony have announced a PS Vita lite, and a Vita TV which is a screenless box that plugs into a TV and used a controller to play PSN, PSP and some Vita games. There is also the upcoming PS4.
VITA
Sony makes the Playstation Vita.
sony computer entertainment
Sony Computer Entertainment.
SONY
I think they both have their pros and cons, but as far as processing power, the Sony Vita wins. Since the Sony Vita has not been released yet, it's hard to decide. In my honest opinion, I love the Nintendo 3DS' user interface and the stereoscopic 3D truly works properly.
No, there is currently no official Wattpad app available for Sony PS Vita. You can access Wattpad through its website on the PS Vita's web browser, but the experience may not be optimized for the device.
sony psp vita
Not with Sprint 3G it can not. For a USA 3G connection it has to be AT&T. For WiFi it can connect with a WiFi signal. Depends. If you mean Sprint's regular broadband service, then a PS Vita can connect and go online via a wireless router. However if you mean 3G connectivity, Sony has announced that AT&T will be the only mobile carrier that supports the Vita in the US.
LittleBigPlanet is published by Sony, so only their own consoles would have the game. And it is on the PS3 and PSP It will be out for the PS Vita June 2012 Also, LBP is in production for Sony's PSP.