Installing an eSIM takes about a minute. The golden rule: do it on Wi-Fi before you travel, because downloading the profile needs an internet connection.
On iPhone: Settings → Mobile Service → Add eSIM → Use QR Code, then scan the code from your GlobalSimify dashboard. Label it “Travel” and turn on Data Roaming for that line when you arrive.
On Android: Settings → Network & internet → SIMs → Add eSIM, scan the QR, then set the eSIM as your mobile-data SIM abroad and enable roaming for it.
Your data validity only starts when the eSIM first connects to a network at your destination — so installing early costs you nothing.