Is there turbulence at 70000 feet?
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# Altitude
Why do long haul flights fly so high?
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What is the minimum safe altitude range?
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Can you be too high to get a phone signal?
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Do cell phones work at 30,000 feet?
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What altitude do you lose your phone signal at?
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Can planes fly at 40000 feet?
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Can a helicopter fly at 40000 feet?
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