Given a travel related situation, and given a specific question about the situation, summarize the question into a title

Input: Consider Input: I have an HTC A9s. I could not find it on the US page of the manufacturer so I went to the UK page.

According to the specs, it does have the US frequencies:

Network4

2G/2.5G - GSM/GPRS/EDGE:
850/900/1800/1900 MHz
3G UMTS (#UL):
850/900/1900/2100 MHz
4G LTE (#UHL):
FDD: Bands 1, 2, 3, 4, 5, 7, 8,12, 17, 28
TDD: Bands 38, 40
4G LTE (#UL):
FDD: Bands 1, 3, 7, 8, 20


Will I be able to use it in the US for calls and Internet?


Output: Using a European (GSM) cell phone in the US


Input: Consider Input: I have dual citizenship in Canada and the UK. How long would I be allowed to stay in the United States under both visas? Am I able to use the two visas concurrently and, if so, what procedures are required to leave the USA and re-enter after a few days?


Output: USA visa law for dual Canadian-UK citizen


Input: Consider Input: A few days ago I wanted to buy Pegasus airline tickets because it was offering a 50% reduction on normal fares. I wanted a few tickets but couldn't even buy a single one. I tried different places with different networks but none worked. I even called my sister in New York to buy tickets for me and the result was again ineffective. 

This is not the first time I encountered this problem. I have faced similar issues with other budget airlines as well (Ryanair, AirAsia). All the time during the sale, the website page was unresponsive. Well I do understand it all happens because of airline biggest sale promotion. I have bought promotion tickets "buy 1 get 1" and "Up to 25% off" before, but never been able to buy anything from the biggest sales.

Is there any possibility or hack to buy an airline ticket in one of these sales?



Output: How to buy low cost airline tickets while airlines are offering big reductions