My questions are for my sister. Can I check-in for her on my phone since she doesn't have access to a computer at the time she needs, and then can she get her boarding pass printed at the curb luggage check? What does she need at curbside as proof of purchase? We are in different time zones and her flight is at 3:30, which is 12:30 my time. Do I check in at 12:30, 24 hours in advance? Thanks in advance for any help you can give.
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