Given a travel related situation, and given a specific question about the situation, summarize the question into a title
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Question: I'd like to fly to the USA at the end of January and I was wondering if my phone (Elephone P7000) supports any of the frequency bands in the USA.

I am flying to Cary, North Carolina and my phone supports dual-sim with these frequencies:


GSM: 850/900/1800/1900 MHz
W-CDMA: 850/900/1900/2100 MHz
LTE: 800/1800/2100/2600 MHz


What network will I be able to use? Which sim-card is obtainable from Germany that is useable in USA? I'll be there for three days, so I won't cause much traffic.


Answer: Using mobile internet with a Elephone P7000 in the USA


Question: I'm an American citizen traveling with Air France from Athens to JFK in New York via Paris. Do I need a transit visa to leave the airport and spend the night in Paris? Can I check a bag through or must I retrieve my luggage and go through immigration and customs?

Thank you.


Answer: 20-hour layover in Paris CDG, 5:15 pm to 1:50 pm


Question: In the AAdvantage program, there are 3 statuses, Gold, Platinum and Platinum Executive. The Platinum has a "72-hour upgrade window". The Executive has a 100-hour window. I assume this refers to when you can sign up for an upgrade and essentially get in line for an unsold first class seat.

Do all these seats invariably go to Executive members, or do Platinum members have a chance at them? In other words, what I am thinking is that if there are dozens of Platinum members on a flight in economy and they all sign up for an upgrade, then there might a long list of Executive members in the line for just a handful of first class seats. But if there are not so many Executive members, then maybe Platinum members would have a shot at those seats.

What is the common experience?


Answer:
Probability of first-class upgrade with only Platinum status?