Did anyone move from Sprint to Verizon?

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http://forum.xda-developers.com – I'm getting a GS3 and signed up for a new contract with Verizon. My questions are about Google Voice. Since the 2 have integration, my Sprint and GV no's are the same. For Verizon, I got a new phone no. and my plan is to make the phone use GV for all calls. This seems like the only way I can keep using GV and not have to give out a new no. to everyone. How do you handle texts? I was hoping to not get a text plan and save some money. I found an app called 'Google Voice sms integration' which claims to put all txts in the regular sms app. Has anyone used it? (HowTos)