Can you use your phone on a plane? In-flight roaming explained for Malaysians

Can you use your phone on a plane?

Short answer: yes, you can, and on the right flight, your phone works almost exactly like it does on the ground. WhatsApp, calls, email, light browsing — all of it, at 35,000 feet. What most Malaysians don't realise is that this isn't "aeroplane Wi-Fi" you pay separately for. It's mobile roaming, built into your phone plan, running through the same satellite network your operator already works with.

This guide explains how in-flight mobile roaming actually works, which airlines and routes support it, what you can and can't do mid-air, and — crucially — how to get FREE in-flight roaming if you're a CelcomDigi subscriber.

Can you use Internet on a plane? The honest answer

Yes — on flights equipped with the AeroMobile in-flight mobile network, you can use your phone for data, calls, and SMS at cruising altitude. Your phone connects to a satellite-linked network installed on the aircraft, just like roaming in a foreign country. You do not need aeroplane mode ON — in fact, you need it OFF. The catch: not every flight or aircraft has the system installed.

The confusion around this comes from two different things that both get called "using your phone on a plane" — and they work completely differently.

The first is aeroplane Wi-Fi — the internet access you buy separately through the airline, connect to like a hotspot, and use through your phone's Wi-Fi. That's a separate product, varies by airline, and doesn't use your mobile number or plan at all.

The second is in-flight mobile roaming — and that's what this article is about. It's your actual SIM card, your actual mobile number, connecting to a satellite-powered network installed on the aircraft. WhatsApp messages come in to your number. Missed call notifications ping. Someone can call you on your regular Malaysian number, and you pick up from 35,000 feet. That's roaming — not Wi-Fi — and it works through your mobile operator.

How does in-flight roaming work?

In-flight mobile roaming uses a small cellular base station (called a picocell) installed inside the aircraft, which connects to a satellite link operated by AeroMobile. That satellite link routes your mobile signal to a ground station, which connects back into the regular mobile network. Your phone behaves exactly as it does when roaming in a foreign country — because technically, that's what's happening.

Here's the step-by-step of what actually happens when you connect mid-air:

The picocell onboard is the key piece of hardware. It's a miniature, low-power base station — basically a tiny mobile tower inside the plane that operates at much lower power than a regular ground tower, which is what makes it safe to use without interfering with the aircraft's navigation systems. The aircraft's metal body also acts as a natural shield, containing the signal inside the cabin.

AeroMobile activates at 6,000 metres (roughly 20,000 feet) altitude — well into the cruise phase. You won't have a signal during taxiing, takeoff, or landing. That's normal and expected.

Which airlines support in-flight roaming (AeroMobile)?

AeroMobile's in-flight network is available on 25 airlines worldwide, including Malaysia Airlines, Singapore Airlines, Cathay Pacific, Emirates, Etihad Airways, Lufthansa, Turkish Airlines, Virgin Atlantic, EVA Air, TAP Air Portugal, EgyptAir, and Uzbekistan Airways. Availability depends on the specific aircraft — not all planes in a carrier's fleet are equipped. Check with your airline before flying.

For Malaysians, the good news is that Malaysia Airlines is one of AeroMobile's partner carriers — specifically on A350 aircraft operated on select routes including London Heathrow, Tokyo Narita, and Hong Kong. If you're flying MAS on one of those long-haul routes, there's a solid chance your aircraft has AeroMobile installed.

The broader list of AeroMobile-equipped airlines spans many of the carriers Malaysians commonly use for long-haul travel to Europe, the Middle East, and East Asia. The easiest way to check: visit AeroMobile and look up your carrier. Note that even on a supported airline, older aircraft in the fleet may not have the system — it's always worth checking for your specific flight.

What can you do with in-flight roaming — and what should you expect?

In-flight mobile roaming supports data, calls, and SMS. WhatsApp messaging, emails, light web browsing, and voice calls all work well. Heavy video streaming and large downloads are slow due to satellite latency — speeds are roughly 3G-equivalent. It works best as a "stay-on-top-of-things" tool rather than a replacement for your ground connection.

The thing to understand is that satellite connections have inherent latency — the signal has to travel tens of thousands of kilometres to a geostationary satellite and back. That round trip adds delay. For messaging and email, you don't really notice it. For real-time video calls or gaming, you will.

How much does in-flight roaming cost?

All CelcomDigi roaming passes — Multi-Day and Monthly — include in-flight roaming for FREE! Multi-Day Passes start from RM28 for a 3-day regional pass covering Singapore, Indonesia, and Thailand, up to RM118 for a 30-day worldwide pass. Monthly Passes for frequent travellers start from RM40/month, or RM20/month with Mega Add-Ons. Every pass includes AeroMobile in-flight coverage automatically.

How to set up in-flight roaming — step by step

You need three things: an active CelcomDigi roaming pass, data roaming switched ON in your phone settings, and aeroplane mode switched OFF (or aeroplane mode ON with cellular re-enabled). Your phone connects to AeroMobile automatically once the aircraft hits cruising altitude. No apps to download, no codes to enter.

Tips to get the most out of in-flight roaming

Buy your roaming pass before boarding — not at the airport. Turn off background sync and auto-updates before the flight. Use messaging over voice calls for better reliability. If you fly regularly, the Monthly Roaming Pass eliminates the need to think about this before every trip.

Frequently asked questions

Ready to fly connected?

Using your phone on a plane is no longer a special perk for first class — it's available to any Malaysian traveller on an AeroMobile-equipped flight, using nothing more than their regular SIM and an active roaming pass. The whole setup takes two minutes in the CelcomDigi app, and once you've done it, it just works

👉 Get your CelcomDigi roaming pass — Multi-Day from RM28, Monthly from RM40/month. In-flight roaming included with every pass, no extras needed. Flying frequently? Check out the Monthly Roaming Pass — from RM20/month with Mega Add-Ons, auto-renews so you never have to think about it again.