I've got an iPhone 4 that has no mobile plan or phone number, but I've got a Google Voice account. I know I can use the Google Voice app to communicate over SMS, but is it possible to configure the built in Messages app to use the Google Voice number?
in android, i know you can set the google voice, and/or hangouts(which is better version of google voice), to divert all texts to the native sms app. but i dont think you can with apple messages. they are so strict and guarding of using imessage for anything else but apple use, so i seriously doubt it. but try hangouts. its just like using a normal phone. and you can check the settings in it and see if it'll do it. yup. you can even facetime in hangouts! haha.