In this instance, the best course of action is to disable roaming on your phone and rely on WiFi as much as possible. Besides, If you truly need to phone home frequently, it's best to purchase a conventional sim, as it won't cost you quite as much.

Tipping 

Some hotels do not disclose tipping fees in advance and include them in your bill without your knowledge. This may surprise you at first when you examine the bill because you were unaware of it. To avoid such situations, inquire ahead of time if the tips are automatically included. You can also look at the bill summary to see whether any automatic tips are included.

Uber Or Cab Charges

A ride from the airport is generally charged by Uber, and the same is true for cabs. Also, during a strike, your Uber driver may charge you twice as much, as usual, to get you to your destination.

To avoid such mishaps, figure out what the cab flat prices are and stick to them. If you can't afford Uber, the most traditional choice is to use public transportation, such as the train, bus, or shuttle. What's more, you can share a cab with other passengers to split the cost of the cab. You'll be able to stick to your budget and save money for other trip expenses this way.