Begin with your daily habits
Maps, messaging and occasional browsing usually require less data than video calls, cloud backups and streaming. Think about which activities will happen on mobile data and which can wait for trusted Wi-Fi.
Reduce avoidable background use
Download offline maps and entertainment before the trip, pause automatic photo backup and app updates, and review which apps can use cellular data. Video quality settings can make a large difference to consumption.
Allow room for changes
Travel days can create unexpected use through navigation, transport apps and rebooking. A small buffer is useful, particularly when you will work remotely or depend on the phone for the full itinerary.
Check usage during the trip
The Ofrili app keeps supported usage information beside the eSIM. Review it periodically instead of waiting for connectivity to stop, and check whether the selected plan supports a top-up.