Install your eSIM before you fly

An eSIM arrives as a QR code in an email, and installing it needs an internet connection. That is the catch: the moment you land is exactly the moment you have none. Your usual line is roaming or switched off, the airport Wi-Fi wants an SMS code before it lets you in, and the email holding your QR code is sitting in an inbox you cannot open. So install it at home, on your own Wi-Fi, the day the code arrives. Installing is not activating: the profile stays dormant on the phone, and the validity only starts counting from the first connection to a network at your destination. You are preparing the line, not spending it. The installation itself takes two minutes. Open the email on a computer or a second phone, scan the QR code with the phone that is travelling, and let it add the line. Give it a name you will recognise — the country works well — because you will be switching it on and off in a list, right next to your usual line. Then leave it switched off until you arrive. When you land, turn the eSIM on, enable data roaming for that line only, and you are connected before you reach passport control. Nothing to download, no shop to find, no Wi-Fi to beg for.