has anyone else received e mail stating they need testers for i phone 7 prize for answering new i phone 6

Those are all scams. Any actual prerelease iPhone testing is limited to Apple and possibly the wireless carriers.

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You can report phishing attempts to Apple by forwarding those emails to reportphishing@apple.com

http://www.apple.com/legal/more-resources/phishing/

Here is an article from Apple to help you identify phishing emails : Identifying fraudulent "phishing" email - Apple Support