Not to anywhere near the degree that it would "end civilization". And land lines would still work just fine.

As for the "magnetic reversal", search the Conspiracy Theory threads for the numerous debunkings of the ideas that it could "end civilization" or that it's happening anytime soon.

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"If this were play'd upon a stage now, I could condemn it as an improbable fiction."
Shakespeare, Twelfth Night
Illuminati's Razor-The most complicatedly evil answer is usually the most correct answer. - Fazor
"Every book is a children's book if the kid can read." - Mitch Hedberg
"Distance doesn’t matter much in space, where if you just start a thing off with the right kind of shove, sooner or later it will get where you want it to go." -Frederik Pohl, Mining the Oort