You most certainly can (send GV an SMS via em) and at NO charges to your cell/Mobile phone, or to GV account or debit against GV standing Prepaid credit. I am a newbie here and have really enjoyed reading all these posts in many different categories. I know this is a very dated thread/subject. By now I'm sure yaolive figured it out.
If that's not the case or anyone out there needs help on the GV (GoogleVoice) subject, I'd be happy to share.
I love to....
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HAHAHA