HT201415: If you can't connect to a cellular network or cellular data

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Q: What is the "why" behind step 5 in article(http://support.apple.com/en-us/HT201415)?

What is the "why" behind step 5 in article(http://support.apple.com/en-us/HT201415)?  What does turning on and off the sim pin "do" that helps with getting a data connection?

iPhone 6, iOS 8.1.2

Posted on Jan 6, 2015 7:13 AM

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Q: What is the "why" behind step 5 in article(http://support.apple.com/en-us/HT201415)?

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