"Just get 10GB, you'll be fine" is the most common — and least useful — piece of eSIM advice out there. A backpacker checking maps twice a day and a remote worker on video calls every morning have almost nothing in common, yet that advice treats them the same. The better question isn't "how much data do people usually buy," it's "how much data do you actually burn through in a day," and that's answerable with basic arithmetic.
What actually eats your data
A handful of everyday activities account for almost all mobile data use. Rough, typical ranges (actual usage varies by app, video quality setting and device):
| Activity | Typical use |
|---|---|
| Turn-by-turn navigation | ~5–10 MB/hour |
| Messaging (text only) | ~5 MB/day |
| Music streaming | ~50–70 MB/hour |
| Browsing and email | ~5–10 MB per 15 minutes |
| Social media scrolling | ~150–300 MB/hour |
| Voice/video calls | ~150–200 MB/hour |
| Video streaming, SD | ~300 MB/hour |
| Video streaming, HD | ~700 MB–1 GB/hour |
Notice the spread: an hour of maps and an hour of HD video sit two orders of magnitude apart. That one variable — how much video you watch or call over — usually decides which of the traveler types below you actually are.
Build your own day-by-day number
This is the calculator, and it fits on the back of a napkin:
- List what you'll realistically do each day from the table above — not what you do at home on Wi-Fi, but what you'll do on the move.
- Estimate hours or sessions per activity. Twenty minutes of navigation, an hour of scrolling, a 30-minute video call home.
- Multiply and add. That's your daily estimate.
- Multiply by trip length.
- Add a 20–30% buffer. There's always a rainy afternoon in the hotel, a call that runs long, or a photo backup you forgot about.
Do that once, honestly, and you'll land closer to the right plan than any generic "10GB is plenty" rule of thumb will get you.
Four traveler types, one 7-day trip
Here's what steps 1–4 look like in practice for common travel styles:
| Traveler type | Typical daily mix | Rough daily total | 7-day total |
|---|---|---|---|
| Light explorer — maps, messaging, occasional social check-ins, no streaming | 30 min navigation, light messaging, 15 min social | ~150–300 MB | ~1–2 GB |
| Business traveler — email, cloud docs, one or two calls, maps between meetings | Email/browsing, 1 hour of calls, navigation | ~700 MB–1.5 GB | ~5–10 GB |
| Digital nomad — working remotely, daily video calls, background music, steady browsing | 1–2 hours of calls, music while working, browsing | ~1.5–2.5 GB | ~10–17 GB |
| Content creator / heavy streamer — uploading photos and clips, live video, HD calls | HD video calls, uploads, heavy social use | ~3–5 GB | ~20–35 GB |
Most people land somewhere between "light explorer" and "business traveler." Video is the outlier that pushes anyone into the higher bands — if your trip is mostly maps and messages, don't buy a streamer's plan just because it feels safer.
Why the buffer matters more than the base number
Plans come in tiers for a reason: nobody's daily mix is perfectly predictable, and guessing low costs you more than guessing a little high. A day of unexpected video calls, a livestream from a concert, or simply more scrolling than usual on a long train ride can double your normal daily use without you doing anything differently.
If your estimate still runs short, it isn't a dead end — you can top up your VamosData eSIM directly from your account mid-trip, without hunting for a new provider or losing the plan you already have installed.
Once you've got a number in mind, browse plans by destination to see the closest match, and if you're not sure your phone supports the technology in the first place, run it through the device compatibility checker before you buy.