What airplane mode actually does to your eSIM

Airplane mode is one switch that disables every radio in the phone. Many travellers use it as a cost control, which works well once you know what it does and does not switch off.

What it disables

Using it to control cost

1. Enable it on landing so the home SIM does not attach to a foreign network immediately
2. Go into cellular settings and switch off the home SIM's roaming data
3. Turn airplane mode off and set the travel plan as the data line

Common mistakes

• Assuming it deletes the profile, which it does not
• Leaving it on and then wondering why messages never arrive
• Using it instead of disabling roaming data, which leaves you exposed once you switch it off

Why it is called airplane mode at all

The name comes from an era when airlines worried that radio signals from phones might interfere with an aircraft's navigation instruments, so passengers were told to switch off every radio during the flight. The mode was designed as one switch that disables everything at once rather than requiring each function to be turned off individually. Many airlines have since relaxed the rule and allow Wi-Fi to stay on while airplane mode is active, but the exact policy differs by carrier and is always worth checking against the in-flight announcement or cabin crew.

Airplane mode is not the same as switching the phone off

Many people treat airplane mode as a kind of shutdown, but the two are quite different. With airplane mode on, the screen, apps, clock and internal notifications all keep working exactly as before. Only the wireless communication parts stop: calls, messaging and data connections. Anything already stored on the phone, such as pre-downloaded maps or saved music, continues to work normally.

This distinction matters when planning what to do in flight, because a message can still be drafted, photos can still be viewed, and downloaded music can still play as normal. What cannot happen is actually sending that message until airplane mode is switched off or Wi-Fi is re-enabled.

Managing two lines when running both the home SIM and a trip eSIM

For anyone running the home SIM alongside a trip eSIM, switching on airplane mode at landing is only the first step, because once it is switched off again both lines try to connect at the same time. If the home SIM's roaming data has not been disabled, it can start working immediately without you noticing. The safer order is to switch off the home SIM's roaming data first, before turning airplane mode off, so there is no brief window where the home SIM connects unintentionally.

1. 1iOS: disable the home SIM's roaming data firstWhile still in airplane mode, go to Settings > Cellular, select the home SIM, and switch off its data roaming option.
2. 2iOS: set the trip eSIM as the primary data lineIn the same menu, set the primary data line to the trip eSIM before turning airplane mode off.
3. 3Android: disable the home SIM's roaming data firstGo to Settings > Network & internet > SIM cards, select the home SIM, and switch off its roaming option before leaving airplane mode.
4. 4Android: confirm the active data SIMIn the same menu, confirm the SIM marked as the mobile data SIM is the trip eSIM, not the home SIM.

Enabling airplane mode and then re-enabling Wi-Fi only

Sometimes the goal is to use Wi-Fi only, with cellular fully off, such as when unsure about charges in a given area or simply wanting to save battery. The way to do this is to enable airplane mode first to switch everything off, then re-enable Wi-Fi separately. Most phones support this combination.

1. 1iOS: enable airplane modeTurn it on from Control Centre or via Settings > Airplane Mode.
2. 2iOS: re-enable Wi-FiTap the Wi-Fi icon in Control Centre or switch it back on via Settings > Wi-Fi. The phone allows Wi-Fi to run even while airplane mode stays on.
3. 3Android: enable airplane modeTurn it on from the quick settings panel or via Settings > Network & internet > Airplane mode.
4. 4Android: re-enable Wi-FiTap the Wi-Fi icon in the same panel to switch it back on. Most Android phones permit this combination as well.

Comparing what happens under three states

When signal does not return after turning airplane mode off

Sometimes after airplane mode is turned off, the phone needs a moment to search for and attach to a network again, which is normal, especially right after landing at a busy airport where many phones are doing the same thing at once. If several minutes pass with no signal at all, work through the following checks before assuming the plan itself has a problem.

1. Confirm airplane mode is genuinely off, not just showing a stuck icon
2. Confirm the trip eSIM is correctly selected as the primary data line
3. Try toggling airplane mode on and off again to force the phone to search afresh
4. If that still does not work, restart the phone, which often clears a stuck network attachment

A checklist for before take-off and before landing

• Before boarding, enable airplane mode as instructed by the airline
• In flight, if the airline permits it, re-enable Wi-Fi separately as needed
• Before landing, disable the home SIM's roaming data in advance while still in airplane mode
• After landing, turn airplane mode off and confirm the trip eSIM is the primary data line

Read the arrival steps

Contact support about installation

Airplane mode as a reset for network problems unrelated to flying

Beyond boarding and landing, airplane mode is also a troubleshooting tool that gets overlooked. When a phone is stuck attached to a weak signal or a mast that is too far away, toggling airplane mode on and off forces it to drop the existing attachment and search completely afresh, which usually works better than simply waiting for the phone to sort itself out.

This works best right after moving location quickly, such as stepping off a high-speed train or going up a tall building, where the phone may still be clinging to the previous mast even though a better one now covers the area. Toggling airplane mode takes only a few seconds and carries no risk to the eSIM profile at all.

The effect of airplane mode on battery and charging

Airplane mode does genuinely save battery, because the radios draw power continuously while the phone is on, more so when it is struggling to hold a weak signal. Switching it on overnight during a trip, when there is nothing urgent to wait for, is a simple habit that leaves more charge for the next morning.

Airplane mode and a paired smartwatch or other accessory

If a smartwatch or Bluetooth headphones are paired to the phone, enabling airplane mode switches off Bluetooth by default too, so paired accessories briefly disconnect. If headphones are needed to play music already downloaded while airplane mode stays on, Bluetooth can be switched back on separately, just like Wi-Fi, without affecting the cellular side, which remains off.

A checklist when airplane mode is suspected as the cause of a problem

1. Look for the aeroplane icon in the top status bar first
2. If it is on, switch it off and wait briefly for the phone to search for a network
3. Confirm the eSIM line's data roaming is switched on, not just that airplane mode is off
4. If there is still no signal, restart the phone before contacting support

Read the no-signal troubleshooting guide

Airplane mode as a way to control notifications while resting

Beyond cost control and battery savings, airplane mode also works well as a way to cut unnecessary notifications while resting, particularly after a long flight across time zones. Notifications from apps back home can keep arriving on the old local schedule, which no longer matches the body's need to rest at the new destination. Switching airplane mode on for that stretch solves the problem instantly, without having to mute each app individually.

The one thing to check first is whether anything important is expected during that window, such as an airport pickup or an accommodation confirmation, since airplane mode blocks every channel of contact at once, with no exceptions.

The difference between airplane mode and do-not-disturb mode

The two are often confused because both make the phone go quiet, but they work quite differently. Do-not-disturb keeps the network connection running as normal; it simply mutes sound and on-screen alerts, so messages and calls still arrive, just silently. Airplane mode genuinely severs every connection, so messages and calls do not reach the phone at all until it is switched off again.

A summary approach for using airplane mode through the trip

The simple rule is to use airplane mode for situations that genuinely call for cutting every connection off, such as boarding and landing, resting periods where nothing is being waited for, and moments of suspecting the phone is stuck on a stale network attachment. For situations that only need quiet while staying reachable for anything important, do-not-disturb is the better tool instead. Matching the right tool to the situation helps with battery, cost, and the peace of mind of not missing anything that genuinely matters.

Read the arrival steps