Yes, you should put your phone in airplane mode on a plane as it's a mandatory safety precaution to prevent potential interference with the aircraft's navigation and communication systems, especially since radio waves from phones can disrupt pilot headsets and ground-based networks, even if the risk of catastrophic failure is low; it's a simple way to ensure a safe flight for everyone, with modern planes allowing Wi-Fi and Bluetooth use in flight.
The bottom line
Current regulatory compliance requires electronic devices to be in airplane mode unless specifically permitted by the airline. Airplane mode is a safety measure, and when it comes to flying, safety, of course, is paramount.
The primary rule is that phones should be switched off for taxi, take-off, and landing. During the cruise phase of flight most airlines will allow smart phones to be used in 'Flight Mode' or 'Airplane Mode' for non voice/text/ browsing functions.
If you're wondering what would happen if you don't put your phone on airplane mode, the answer is probably nothing. The truth is, flight attendants don't have technology to detect if your phone is on.
The most confiscated items at airports are usually everyday items people forget about, primarily oversized liquids, aerosols, and gels (LAGs), along with knives, sharp objects (like scissors, multi-tools), and lighters, due to carry-on restrictions, with firearms also frequently found in checked bags despite strict rules. Batteries (especially lithium) are also common, needing to be in carry-ons, and even items like protein powder can be flagged for extra screening.
Standard SMS messaging typically won't work in the air since you'll need a cellular network connection. But as long as there's Wi-Fi available on a flight, you'll have some way to communicate with people on the ground.
You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.
Internet-based messaging apps can work during a flight if you're connected to in-flight Wi-Fi. Apps like iMessage, WhatsApp, Facebook Messenger, and Viber use an internet connection rather than cellular networks.
Airplane mode can be useful, but it's important to know its downsides. Losing connectivity, missing important messages, and affecting your navigation and smart home devices are real drawbacks. Plus, it doesn't save as much battery as you might think.
According to a flight attendant for a major U.S. airline, this feature isn't just about comfort. It actually exists primarily as an accessibility feature. “There's usually a little button underneath the armrest that allows it to lift, mainly for passengers that require a wheelchair,” she told Southern Living.
Modern aircraft are robust when it comes to electronic interference. However, your device can still create electromagnetic noise that might interfere with cockpit communication systems, which is distracting for the pilot. From an individual perspective, your battery will drain fast if your phone isn't in airplane mode.
Modern aircraft are heavily shielded, and newer phones are better at isolating signals. In fact, the FAA and airlines are starting to allow Wi-Fi and Bluetooth even during flight. So today, Airplane Mode is more about network congestion and legal compliance, not safety.
Some airlines offer complimentary Wi-Fi to all passengers, while others restrict access to loyalty program members, premium-cabin travelers or those with elite status.
Typically, it is not possible to make phone calls or send messages in airplane mode, but some smartphones allow calls to emergency services. Most devices allow continued use of email clients and other mobile apps to write text or email messages.
You can use airplane mode to avoid roaming charges when travelling. You won't be able to send or receive text messages or phone calls, or use data services. You could connect manually to a Wi-Fi network to check your email or browse the internet. (By default, Wi-Fi and Bluetooth are disabled in airplane mode.)
Staying Connected with WhatsApp While Abroad
WhatsApp allows you to send messages and make calls without incurring hefty international charges: To send a message, open a chat, type your message, and tap "Send." To make a call, open a chat and tap the phone icon.
Simply activate WhatsApp airplane mode before opening the app, and you'll be able to view messages without the blue double check WhatsApp alerting the sender.
As per the guidelines, all carry-on liquids, gels, and aerosols must be in containers of 3.4 oz (100ml) or less, packed in one clear quart-size bag.
What is not allowed on a plane carry-on? Everything you need to know
The Transportation Security Administration (TSA) doesn't ask you to keep your medicines in their original prescription bottles. But each state may have its own rules. If you aren't bringing your medicine in its original bottle, bring a copy of the prescription or a letter from your doctor.
Are you allowed to use your phone at all on a plane? Sure! Once it's in airplane mode, you can safely use any feature on your phone. You can also enable Wi-Fi to connect in flight.
What happens if someone calls you on airplane mode? Calls won't go through, and you won't receive a notification. The caller might be directed to voicemail or hear that you're unavailable.
You can usually do so after take-off is complete, allowing you to use the on-board WiFi or use your cellular service to make and receive calls. You'll be asked to turn airplane mode back on during landing and can disable it once more after the landing is complete.