If you’ve ever tried to retrieve personal e-mail using your phone, you know how excruciating it can 
be. Cell phones and smartphones alike lack spam filters, so it’s not uncommon to end up with 50 pieces of junk for every legitimate message. That makes for long, slow, battery-draining mail downloads and almost impossible mail management.
Indeed, most people who’ve been down this road decide it’s not worth the hassle. That’s sad, because your phone rocks as a wireless communicator. It’s just hamstrung by the spam.
Fortunately, solutions exist. If you’re tired of spam clogging your phone’s inbox, read on to learn what you can do about it. Alpha Geek: Keep spam off your cell phone - Lifehacker