Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5) Work gives us AT&T blackberrys and I have an iPhone 4 on AT&T. I put my work BB SIM in my iPhone and didn't have data but voice and texts works. Then I went to http://www.unlockit.co.nz/ and set a custom apn and now data works great on the iPhone. Now I want to cancel my iPhone to save $90 a month and port my number to use google voice. Will AT&T or work know I'm using my BB SIM in my iPhone? Just trying to save money and consolidate phones... Thoughts?