FlightSIM eSIM on iPhone: Install and Setup Guide
Install a FlightSIM eSIM on iPhone over Wi-Fi before you fly: the iOS menus that keep moving, the one roaming toggle, and what a data-only line cannot do.
Updated August 28, 2026
Three things to know before you start
It connects only at your destination
Install at home, but expect “No Service” or “Activating…” until you land — that is normal. The plan wakes up when the line first finds a network at your destination.
Your QR code works exactly once
Seeing “invalid QR” after a scan almost always means the eSIM is already on your phone. Don’t rescan — open your SIM list and just switch the line on.
No internet after landing? Check Data Roaming
Turn the travel line on, set it as your mobile data line, and switch Data Roaming ON for it. This one toggle causes most “it doesn’t work” messages.
Installation steps
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Step 1
Buy your plan in the FlightSIM app
Choose the destination and data plan that fits your trip and pay in the app. The QR code and manual activation details appear under the order and stay there, so a failed first attempt costs nothing.
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Step 2
Install while you are still on home Wi-Fi
The profile downloads over the internet, the one thing an arrivals hall will not reliably hand you. Being early costs no plan time: validity starts at the line's first connection to a network at the destination, not when you pay.
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Step 3
Open Settings and find the cellular menu
Settings Cellular Add eSIM
Tap Settings, then the cellular entry. Apple has renamed this more than once: depending on iOS version and region it reads Cellular, Mobile Data or Mobile Service. All three open the same screen, so go by position rather than wording.
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Step 4
Tap Add eSIM, then Use QR Code
Add eSIM Use QR Code
Recent iOS labels the button Add eSIM; older releases say Add Cellular Plan or Add Data Plan. Take the QR code option, not Transfer From Nearby iPhone, which moves a line you already own between handsets. Scan from a second screen, or tap Enter Details Manually and copy the SM-DP+ address and activation code across (two long strings in your order email). On iOS 17.4 or newer there is an even shorter path: long-press the QR image in the email itself and tap Add eSIM.
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Step 5
Label the line, then leave it switched off
New eSIM Custom Label
Name it Travel or FlightSIM so the dual-line screens read clearly, and keep your usual SIM as the default for calls. Then disable the new line until you land; nothing is consumed while it sits there.
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Step 6
Switch it on after you land
Settings Cellular Cellular Data
On the ground, reopen the cellular menu, select the FlightSIM line, turn it on and set it as the line carrying data. If both lines on your phone are digital already (several current iPhone models ship with no physical tray at all), check carefully which one you are editing.
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Step 7
Turn Data Roaming on for the FlightSIM line only
Cellular Travel Data Roaming
Open the FlightSIM line and switch Data Roaming on. That toggle is how iOS lets a line use a network it does not belong to, which is exactly what a travel plan does; it adds nothing to a prepaid plan. Check it is still off on your home SIM, where it genuinely would cost you.
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Step 8
If nothing appears, force a fresh search
Cellular Network Selection
The phone normally finds a partner network by itself a minute or two after landing. If not, toggle Airplane mode. Still nothing: open Network Selection, turn Automatic off, pick an available network, let it register, then set selection back to Automatic.
The reason to sort this out before you fly is your own carrier’s price list. For most destinations outside your home region, out-of-region roaming sits in the most expensive tier the phone has, and a week of maps and photo backup at that rate produces a bill people remember. The alternatives on arrival are thin: airport Wi-Fi stops at the terminal door, and a local prepaid SIM means finding an open store and, at some counters, showing identification.
A prepaid data eSIM takes that decision out of the trip. Buy a plan in the FlightSIM app, install a second line alongside the SIM you already use, and switch it on when you land — the install over Wi-Fi first, then two settings on arrival: the eSIM as your data line, and Data Roaming on for that line alone. Validity starts at the first connection to a network at the destination rather than at purchase, so installing early costs nothing. Plans are on the pricing page, and what an eSIM is is the shorter read if this is your first digital line. Hotspot is included, useful for a laptop in a hotel room or a car with four people in it.
This page covers iPhone from XS and XR onward, and flags where Apple’s menu names differ between iOS versions rather than pretending there is one fixed path. On Android, start from the Samsung, Pixel or other Android page instead.
Two things we would rather you knew before buying. The plan is data-only, so it gives you no local phone number, and a verification code, a rental desk or a restaurant callback that wants one cannot be answered by this line — your own number rides along on your own SIM and stays reachable, and there is no workaround beyond that. The second is coverage: an eSIM travels on the same local networks a physical SIM would, so it is only ever as good as the networks already there, better in dense areas and thinner in remote ones. Anything else is on the FAQ.
Troubleshooting
Do I get a local phone number with this?
No. The plan is data-only, so there is no local number on it and no way to add one. Your own number stays on your own SIM and keeps working for calls and texts. Plan around it: a delivery app, a rental counter or a callback service that wants a local number for a verification code cannot be answered by a data eSIM.
Will I have signal everywhere I go?
The eSIM rides on the same local networks a prepaid SIM bought on arrival would use, so coverage is a question of where those networks reach — the same for any SIM, physical or otherwise. Dense areas are consistently strong; remote or mountainous stretches can be thinner. Download offline maps for anywhere off the beaten path.
The QR code will not scan.
Raise the brightness on the screen showing the code, hold the iPhone 20-30 cm back, and get the whole square in frame without glare. If it still will not read, tap Enter Details Manually and copy the SM-DP+ address and activation code from your order — the same line results either way.
The QR code says invalid, already used, or the install fails on a second try.
An activation code is single-use, so this error almost always means the first scan already worked and the eSIM is on the phone. Do not keep rescanning. Open the phone's SIM list (the cellular or SIM manager screen) or My eSIMs in the FlightSIM app: if the line is listed, the install is done — turn the line on, give it mobile data and enable Data Roaming instead of installing again.
There is no Add eSIM option, or I get eSIM Cannot Be Added.
Open Settings, General, About and look for an EID. If one is listed, the hardware is fine and the obstacle is a carrier lock — ask your operator to unlock the handset, far easier before you fly. No EID at all means the iPhone predates eSIM and needs a physical SIM.
I have landed and the eSIM shows no service.
Check in order that the line is on, selected for cellular data, and has Data Roaming enabled. Then toggle Airplane mode. If it stays blank, turn off automatic network selection, choose a network by hand, and switch automatic back on once it registers.
Does turning Data Roaming on mean roaming charges?
Not on this line. The plan is prepaid for the destination's networks, so no home operator is in the chain to bill you — the toggle only tells iOS the line may attach to a network it does not own. Keep it off on your primary SIM, which your carrier does meter.
Do I have to scan the QR code at all?
No. In the FlightSIM app, open My eSIMs, tap your plan and tap Install — the profile installs on the same phone with no camera involved. The QR route exists for installing from a second screen; both end in the identical profile, and the steps after the install are the same either way.