I have a Droid Razr Maxx (don't think this is relevant, though). I want to forward all text messages sent to my Verizon Wireless number to a different number (Google Voice), so that I can receive texts even when I have no cellular service. As I understand it, this means that I have to tell Verizon to push my texts to the new number; it is not something that can be accomplished by an app on my phone (if I have no cell service, the texts would never make it to my phone).