Tether without service?

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http://androidforums.com – Alright everyone, this may be a completely stupid question, but it has been enticing me for a while. I currently have a Samsung Galaxy Player, which is essentially like an iPod: It can download apps, all that good stuff, but it can't make calls or texts without an app like Google Voice. Now, here is the question: Because I don't have phone service, can I tether to make my own wifi signal? (If any of you could also somehow get this to work like a phone, that would be great.) The Galaxy player is rooted, so that won't be an obstacle. I do have a regular phone, but I have the galaxy player for f (General)