I have two Vita's, a 3G I use daily as a phone with Skype, and a wifi only model I at home. The only issue I have ever had is random issues while browsing the store. Chat sessions, Skype, Crackle, Netflix, Hulu, Youtube, etc. I have never had any issue with.
Try what the people above said about the power saver, but if that doesn't work, it may be something with your system. Have you ever rebuilt the database? I had some network issues with my PS4, and that fixed the issue.
Stop hate, let others live the life they were given. Everyone has their problems, and no one should have to feel ashamed for the way they were born. Be proud of who you are, encourage others to be proud of themselves. Learn, research, absorb everything around you. Nothing is meaningless, a purpose is placed on everything no matter how you perceive it. Discover how to love, and share that love with everything that you encounter. Help make existence a beautiful thing.
Kevyn B Grams
10/03/2010
KBG29 on PSN&XBL
