Using eSIM on iPhone: Complete Guide for Travellers

An eSIM from Hello lets you add a travel data plan to a compatible iPhone without inserting a plastic SIM card. Buy and activate Hello’s eSIM before departure, then use it alongside your home line for calls and texts while Hello handles travel data. Apple says eSIM support begins with iPhone XS, iPhone XS Max, and iPhone XR, while iPhone SE (2nd generation) and newer models also support eSIM; exact availability can vary by country and model.

For a smooth iPhone eSIM setup, confirm your phone is unlocked, install the plan over Wi-Fi, label each line clearly, and switch mobile data to Hello when you land. Hello provides eSIM connectivity in more than 200 countries, with plans starting from 5GB and prices updated live in the Hello app.

Most travellers can use an eSIM on an iPhone XS, iPhone XS Max, iPhone XR, or any later iPhone, provided the device is unlocked and the model supports eSIM in its sales region. Apple lists iPhone SE (2nd generation) and later, iPhone 11, 12, 13, 14, 15, 16, 17, and 18 families as compatible, although regional differences matter.

Before buying Hello’s eSIM, check your model at Settings > General > About. Look for an EID and confirm that Carrier Lock says “No SIM restrictions.” If the EID is missing, your iPhone may not support eSIM or may be a regional variant with restricted functionality.

iPhone model or situation	Typical eSIM capability	Travel note
iPhone XR, XS, XS Max	One eSIM plus a physical SIM	Check regional compatibility
iPhone 11 and 12 series	One eSIM plus a physical SIM	Useful for keeping your home line active
iPhone SE (3rd generation), iPhone 13 and newer	Two active eSIMs supported	Convenient for multiple destinations
iPhone 14 and newer in selected markets	Often eSIM-only	No physical SIM fallback
Mainland China variants	Special restrictions apply	Verify the exact model before departure

Apple notes that iPhone 17 models sold in certain markets, including Japan, the United States, Canada, and several Gulf countries, are eSIM-only, while other regional versions may retain a nano-SIM tray.

The easiest iPhone eSIM setup is to purchase an eSIM from Hello, install it while connected to reliable Wi-Fi, and leave your home line available for calls or verification messages until you reach your destination. Installation usually takes only a few minutes, but setting it up before flying avoids airport Wi-Fi problems.

In the Hello app, choose your destination and plan, then follow the activation instructions. On your iPhone, the menu is generally Settings > Mobile Service or Settings > Cellular, followed by Add eSIM. You may scan a QR code, use a carrier link, or enter activation details manually, depending on the plan.

Use these practical steps:

• Name the new line “Hello Japan,” “Hello Thailand,” or another label you will recognise.
• Keep your home line labelled “Primary” so you do not accidentally disable it.
• Set Mobile Data to Hello when you arrive.
• Turn Allow Mobile Data Switching off if you want to prevent unexpected use of your home line.
• Enable Data Roaming for the Hello line if the activation instructions require it.
• Keep your home line enabled for important SMS messages, but confirm your home carrier’s roaming charges first.

For a trip to Japan, install Hello eSIM for Japan before departure, then test that the plan appears under Mobile Service. Tokyo’s major stations and airports have Wi-Fi, but having the plan ready is more reliable for navigation immediately after landing.

iPhone dual SIM travel works by assigning different jobs to two lines: your home SIM remains available for calls and messages, while Hello’s eSIM becomes the mobile-data line at your destination. This arrangement is especially useful for two-factor authentication, travel bookings, and messaging apps tied to your usual number.

Apple supports one physical SIM plus one eSIM on many iPhone XS, XR, 11, 12, 13, and later models. iPhone SE (3rd generation), iPhone 13, and newer models can generally use two active eSIMs, although regional and carrier restrictions still apply.

Set up your lines as follows:

• Default voice line: Keep your home number if you expect calls.
• iMessage and FaceTime: Check that your preferred number or Apple Account email remains selected.
• Mobile data: Choose Hello for the trip.
• Data roaming: Enable it only on the Hello line when instructed.
• Mobile data switching: Leave it off to reduce the chance of home-line roaming charges.

For example, on a 10-day Thailand trip, you could leave your UK, US, or Australian number active for bank texts and use Hello for maps, ride-hailing, translation, and messaging. In Bangkok, airport taxis and app-based rides often require mobile data, while island destinations such as Koh Samui or Koh Phi Phi can have less dependable public Wi-Fi. Save hotel addresses offline as a backup.

Managing an iPhone eSIM is straightforward: open Mobile Service settings, select the line you want, and change its label, data permissions, or activation status without removing the profile. Keeping a travel eSIM installed can make future trips quicker, but deleting it may require a new activation process.

To switch data lines, go to Settings > Mobile Service > Mobile Data and select Hello or your home carrier. You can also select a line and change whether it is enabled, whether data roaming is allowed, and which number handles calls or messages.

Useful management habits include:

• Label profiles by destination and month, such as “Hello Italy May 2026.”
• Disable expired plans rather than deleting them immediately if you may need account details.
• Delete a plan only when you are certain it has expired and you will not reuse it.
• Check the Hello app for remaining data and plan validity before switching.
• Review Settings > Mobile Service > Mobile Data Usage to identify unusually heavy consumption.

A travel plan is not the same as a phone number. Hello’s eSIM plans are primarily designed for mobile data, so use WhatsApp, iMessage, FaceTime, or another internet-based service for communication when appropriate. Your home carrier may still charge for traditional calls, SMS, or roaming while its line remains active.

Most iPhone eSIM problems come from an incompatible or locked device, incomplete installation, incorrect data-line settings, or weak local coverage. Check the basics in order before deleting the plan, because removing an eSIM can make reinstallation more complicated.

If Hello data does not work, try this checklist:

• Confirm the iPhone has an EID and shows “No SIM restrictions” under Settings > General > About.
• Restart the iPhone after installation and after landing.
• Check that the Hello line is turned on under Settings > Mobile Service.
• Select Hello under Mobile Data.
• Turn data roaming on for Hello if the plan instructions require it.
• Toggle Airplane Mode on for 30 seconds, then turn it off.
• Check that the plan has not expired and still has data remaining.
• Move outdoors or to a different area if buildings, mountains, or underground transport are blocking signal.
• Install any pending iOS update before departure, preferably over home Wi-Fi.

If activation remains stuck, capture the exact error message and contact Hello support before deleting the profile. On arrival in Japan, manually selecting a network may help in a rural area, but automatic network selection is usually the best first setting. Remember that underground Tokyo Metro sections, mountain roads, and remote Thai islands can temporarily interrupt service even when the eSIM is correctly installed.

An iPhone eSIM can be used before, during, and after a trip, but the exact experience depends on the iPhone model, purchase region, carrier lock, and local network support. The following answers cover the questions travellers most often ask when preparing a Hello eSIM.

Can I install Hello’s eSIM before flying? Yes. Install it over dependable Wi-Fi before departure, but check the plan’s activation and validity rules in the Hello app. Some plans begin when installed, while others begin when they connect to a supported network.

Do I need to remove my physical SIM? No. Compatible iPhones can usually keep a physical home SIM active while Hello provides travel data through eSIM. iPhone 14 and newer models sold in some markets may be eSIM-only.

Will my phone number change? Your home number normally remains on your existing line. Hello’s eSIM is a separate mobile-data plan, so keep your home line enabled if you need bank verification texts or calls.

Can I use two eSIMs at once? Apple says iPhone SE (3rd generation), iPhone 13, and later models support two active eSIMs, subject to regional and carrier restrictions.

How much data should I buy? Light users may need 5GB for maps, messaging, and occasional searches over a week or two. Video, hotspot use, cloud backups, and frequent social-media uploads require more; disable automatic photo backup over mobile data to conserve your plan.

Can Hello help with trip expenses too? Yes. The Hello app also supports AI receipt scanning, voice expense entry, bank-statement import, automatic currency conversion, budget tracking, and expense splitting with friends across multiple currencies.