![]() In concert halls and movie theaters, it is recommended to turn off your phone or set it to silent mode. You will not be able to make calls or communicate, but you will still be able to use the photo and alarm functions. If you really want to conserve battery power, turn on Airplane Mode. The battery will run down as you look up places you want to go, use maps, and so on. You will probably have many opportunities to use your smartphone while traveling. Please note, however, that you will not be able to use the call function. By connecting to Wi-Fi with Airplane Mode turned on, you can use the Internet overseas without worry. To prevent this, turn on Airplane Mode from the time you board the plane until you return to your home country when traveling abroad. You can use the Internet with your smartphone overseas, but international roaming (using data communication overseas) may result in expensive communication charges. Preventing expensive communication charges when traveling abroad Among them, we would like to introduce three examples. ![]() What is the difference between Airplane Mode/Manner Mode/Goodnight Mode on the iPhone?Īirplane mode can be used for various purposes.How to set communication functions for different situations when traveling abroad.In this article, we will explain when to use Airplane Mode, how to set communication functions for different situations, and the difference between Airplane Mode/Manner Mode/Goodnight Mode on the iPhone. Airplane mode was originally implemented to prevent radio waves emitted by electronic devices from affecting airplanes, but there are many other uses. When you put your phone in airplane mode, the GSM/3G Radio inside your phone is completely disabled and you can still use the phone for other functions.Airplane mode is a feature that turns off all communication from electronic devices such as smartphones. Planes with on-board cell coverage, allow your phone to communicate using very low power, or Wi-Fi. To compound matters, the weaker the signal your cell phone picks up from the tower, the more it amplifies its signal to try and get a response (and the more battery it uses). Ask yourself: Do you really want to annoy the pilot charged with getting you safely to your destination? Imagine that noise, constantly, from the phones of over 100 passengers! Or worse yet, that noise interfering with some navigation signal that was sent so as to avoid a collision with another plane. Now imagine that noise in the pilot’s headphones while he is receiving a critical bit of information from ground control. ![]() Now, in this clip it’s not very loud, but it can be. Have you ever heard what it sounds like when you leave your phone on a Hi-Fi speaker while you are receive an incoming call, especially older phones? By switching your phone to airplane mode you show your appreciation to the people doing their jobs to get you where you want to be. The Wi-Fi signal is much weaker (100mW) than GSM at its peak, and I never heard of it causing any problems. They communicate at very low power without causing any disturbance. When in-flight cellular service is provided, there is a cell station right beside those phones. However, if say, 50 people on board are inconsiderate enough who can’t be bothered to switch their cell radio off, there will be 50 phones constantly looking for cell towers at maximum power. ![]() Of course, there is plenty of attenuation between phones in the cabin and the pilots’ radio. It is not safety critical, but is annoying for sure. I actually heard such noise on the radio while flying. A phone’s radio emissions can be very strong, up to 8W they cause this noise due to parasitic demodulation. You may have heard that unpleasant noise from an audio system that occasionally happens when a mobile phone is nearby. But, most likely, not badly enough for them to take action against you, if that’s what you want to know. Your phone will probably annoy a few pilots and air traffic controllers. This article originally appeared on in response to the question, What happens when you don’t put your phone on airplane mode on an airplane? Occasionally we syndicate content from the site if we think it will interest TPG readers. is a question-and-answer site where content is written and edited by its community of users.
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