How to save mobile data abroad: the settings that actually matter
Most of the data you burn on a trip isn't what you use on purpose — it's what your phone does in the background: updating apps, backing up photos, downloading media in chats. At home this goes unnoticed thanks to home Wi-Fi, but abroad on a travel plan it eats through gigabytes in a day. Here are the iPhone and Android settings that cut exactly that background use, while keeping what you actually need — maps, messengers and calls — working normally.
Auto-updates and background downloads — the biggest hidden cost
A smartphone updates apps and the operating system by default as soon as it finds a network, without asking. One large update can weigh several hundred megabytes, and if a dozen apps need updating at once, that's gigabytes in a single night at the hotel.
On iPhone: Settings → App Store → turn off 'App Updates' and 'Automatic Downloads' over cellular. On Android: Google Play → profile icon → Settings → Network preferences → 'Auto-update apps' → 'Over Wi-Fi only'.
Check for updates manually once a day when you have hotel Wi-Fi, rather than leaving it to automation.
Cloud photo and video backup: pause it
iCloud and Google Photos upload every new photo and video to the cloud right after you shoot it, by default. On a trip where you're shooting a lot more than usual, this is one of the biggest sources of data use — especially video, which weighs far more than photos.
On iPhone: Settings → [your name] → iCloud → Photos → turn off 'Sync this iPhone' for the trip, or limit cellular use to important features only. On Android: Google Photos app → profile icon → Backup settings → turn off backup or allow it only over Wi-Fi.
- Turn off automatic photo and video upload to the cloud over cellular
- Keep messenger media auto-download on only for a few favourite chats
- Limit syncing of work cloud folders to Wi-Fi networks
- Check that a full phone backup isn't quietly running in the background
Offline maps — savings and a backup when signal disappears
Real-time turn-by-turn navigation is one of the most data-hungry things a phone does, especially when the route keeps recalculating. Offline maps solve two problems at once: they save data and keep working where there's no signal at all — in mountains, tunnels, on a ferry or on the metro.
Most map apps have a 'Download area' or 'Offline maps' option in settings — download the city or region you need in advance, on hotel Wi-Fi or before you leave home, and refresh it every few days if you're staying somewhere for a while.
Low data mode and video autoplay
Both platforms have a built-in mode that cuts background data use across all apps at once. On iPhone it's 'Low Data Mode': Settings → Cellular → Cellular Data Options → 'Low Data Mode'. On Android it's 'Data Saver': Settings → Network & internet → Data usage → 'Data Saver' → turn on.
It's also worth turning off video autoplay in social apps: YouTube, Instagram and TikTok usually have an 'Autoplay' or 'Video quality' toggle in settings — set it to 'Wi-Fi only' or to the lowest quality on cellular. Video that plays on its own as you scroll is one of the least noticeable and biggest sources of data use.
Turn on low data mode right after installing the eSIM — that way it's active from day one of the trip, not only after data has already started running low.
Messengers: auto-downloading photos and videos in chats
WhatsApp, Telegram and similar apps download every media file from your chats automatically by default, including group chats where photos and videos arrive constantly. Turn off auto-download over cellular in the messenger's settings, keeping it on for Wi-Fi only — text messages are unaffected, and any file can still be downloaded manually when you actually need it.
In Telegram this is under Settings → Data and Storage → Auto-Download Media; in WhatsApp it's Settings → Storage and Data → Media Auto-Download. In both cases, just uncheck the boxes next to 'Mobile data'.