How much mobile data you need on an eSIM depends entirely on what you're going to do with your phone while you're away. Messaging all day? A small plan covers you comfortably. Streaming video every evening? You'll need significantly more. Here's how to work out the right amount before you buy.
Step one: check your actual usage at home
The most reliable way to predict your travel data needs is to measure what you actually use at home over a similar time period. Both iPhone and Android make this straightforward.
Checking data usage on iPhone
[numbered title="Open Settings and go to Cellular or Mobile Service" pill=""]Find the Cellular or Mobile Service option in your iPhone Settings app.[/numbered] [numbered title="Scroll down to find current period usage" pill=""]iPhone shows total data used since you last reset the counter, broken down by app.[/numbered] [numbered title="Tap Reset Statistics and start measuring" pill=""]Reset the counter, then use your phone normally for a week. The figure at the end of that week is a reliable guide to your daily travel data needs. Note that this only tracks the active SIM — under Mobile Data you can select which SIM to view.[/numbered]Checking data usage on Android
[numbered title="Open Settings and find Network and Internet" pill=""]The exact label varies by manufacturer — look for Network and Internet, Connections, or similar.[/numbered] [numbered title="Select SIMs and choose the SIM to check" pill=""]Choose the SIM line you want to analyse.[/numbered] [numbered title="Select App Data Usage and set your date range" pill=""]Toggle the date period to see usage for a specific week. This shows per-app breakdown so you can see exactly where data goes.[/numbered]Checking via your mobile bill
Your network provider's monthly invoice also shows total data used per billing period. Cross-referencing this with your device's per-app breakdown gives you the clearest picture of typical usage.
How much data does each activity actually use?
Once you know your baseline, these figures help you understand which activities are driving consumption.
| Activity | Approximate data usage | How far does 1GB go? |
|---|---|---|
| WhatsApp / Messenger (text only) | ~5KB per message | ~200,000 messages |
| WhatsApp / Messenger (images) | ~500KB per image | ~2,000 images |
| WhatsApp / Messenger (video) | ~10MB per video | ~100 videos |
| Voice calling (WhatsApp, etc.) | 1–6MB per minute | 2–3 hours |
| Video calling (FaceTime, Zoom) | ~500MB per hour | ~2 hours |
| Instagram browsing | ~500MB per hour | ~2 hours |
| TikTok | ~4MB per 15-second clip | ~1 hour of browsing |
| Facebook scrolling | ~1.5MB per minute | ~10 hours |
| YouTube (HD) | ~3GB per hour | ~20 minutes |
| Spotify (high quality) | ~144MB per hour | ~7 hours |
| Google Maps (active navigation) | ~200MB per hour | ~5 hours |
| Netflix (high quality) | ~3GB per hour | ~20 minutes |
How to choose the right SIMOVO plan
With your baseline usage and the figures above, a rough calculation usually makes the right plan clear. A traveller who mainly messages and browses social media for a week will comfortably manage on 3–5GB. Someone who video calls daily and uses maps heavily will want 10GB or more. Anyone planning to stream regularly should consider an unlimited plan with a daily reset.
SIMOVO plans are available by country and by duration — from a week to six months — with unlimited options that reset daily for destinations where you need consistent heavy access. If you're unsure, the SIMOVO data calculator lets you estimate based on your expected activities.
[esim flag="🌍" label="SIMOVO eSIM" data="Plans from 1GB to unlimited" price="from £3" href="https://simovo.com" benefits="Prepaid · No roaming charges · Instant QR setup · Daily reset on unlimited plans"]Find the right plan for your trip[/esim] [faq] [q]How much data do I need for a week abroad?[/q] [a]It depends on your usage pattern. A week of messaging, occasional social media browsing, and maps typically needs 3–5GB. Add daily video calls and that rises to 8–10GB. Regular streaming pushes requirements significantly higher — 20GB or an unlimited plan is more appropriate if you plan to watch video content most evenings. The most reliable approach is to check your actual device usage over a week at home before choosing a plan.[/a] [q]How much data does WhatsApp use?[/q] [a]Text messages on WhatsApp use around 5KB each — roughly 200,000 messages per GB. Images add around 500KB per photo, and videos around 10MB each. Voice calls use 1–6MB per minute. WhatsApp is one of the lightest data applications available, and even heavy WhatsApp users rarely need more than 1–2GB for messaging alone over a week.[/a] [q]How much data does Google Maps use?[/q] [a]Google Maps in active navigation mode uses up to 200MB per hour. The best way to avoid this cost entirely is to download offline maps for your destination before you travel — this works without any data connection and removes navigation as a factor in your data budget entirely. Offline maps are available in Google Maps for most destinations worldwide.[/a] [q]How much data does Netflix use?[/q] [a]Netflix at high quality uses approximately 3GB per hour — around 20 minutes of content per gigabyte. It is by far the most data-intensive common smartphone activity. If you plan to watch Netflix while travelling, download episodes over hotel or airport WiFi before you travel, rather than streaming over your eSIM data plan.[/a] [q]What is the difference between a 1GB, 3GB, and 5GB SIMOVO plan?[/q] [a]A 1GB plan suits travellers who mainly need messaging, light map use, and occasional browsing — roughly a weekend trip or a week where WiFi is available most of the time. A 3GB plan covers a week of regular social media, messaging, and maps. A 5GB plan is more comfortable for a week with daily use across multiple apps. For longer trips or heavier usage including video calls, 10GB or an unlimited plan with daily reset is more appropriate.[/a] [/faq]
