Here's the short answer: 1GB is enough for a few days of "light" use—maps, messaging, and the occasional search; 3GB suits people who use social media and look things up every day, lasting several days to about a week; and 5GB is a good fit for those who also want to share photos and watch the odd short video. That said, data usage varies a lot depending on the apps you use, video quality, and network conditions, so it's best to treat these as rough guidelines rather than fixed numbers. In this article, we break down what you can actually do with 1GB, 3GB, and 5GB by activity, and explain in plain terms how to pick the right amount for you. Reading our guide to choosing a travel eSIM alongside this can make the decision even easier.
- 1GB is a rough guide for a few days of light use centered on maps and messaging
- 3GB is a rough guide for several days to a week of daily social media and browsing
- 5GB suits people who also want to share photos and watch the occasional short video
- These are data-only plans, so there's no phone number for voice calls or SMS, but app-based calls (e.g. WhatsApp) work over data
- You can top up if you run low, so starting with a smaller amount is a safe bet
What is "data allowance"? Picturing 1GB
Your data allowance (measured in GB, or gigabytes) is the upper limit on how much data you can use over the internet. Viewing web pages, loading maps, browsing social media, watching video—every one of these uses data. Text-based activities use very little, while photos, video, and other data-heavy content use a lot more.
1GB is roughly 1,000MB. Sending text messages or plain emails uses almost nothing, but a single hour of video can use several times more or less data depending on the quality setting. That's exactly why you can't say "1GB equals X hours" across the board—it depends entirely on what you're doing.
Rough data usage by activity (what can you do with 1GB?)
The table below shows commonly cited estimates. Actual usage shifts depending on app design, quality settings, and network conditions, so please treat these as reference figures only.
| Activity | Approximate usage | Rough guide per 1GB |
|---|---|---|
| Text messaging (e.g. WhatsApp) | Very little | Thousands to tens of thousands of messages |
| Email (no attachments) | A few dozen KB each | Over 10,000 emails |
| Web browsing | About 0.3–1MB per page | About 1,000–3,000 pages |
| Maps & navigation | About 5–10MB per 30 min | About 50–100 hours |
| Social media (image-heavy) | About 300–600MB per hour | About 2–3 hours |
| Music streaming | About 60–150MB per hour | About 7–15 hours |
| Video (standard quality) | About 0.5–1GB per hour | About 1–2 hours |
| Video (high quality / HD) | About 1.5–3GB per hour | Less than 1 hour |
As you can see, 1GB can last several days of travel if you mainly use maps, search, and messaging, but watching video burns through it quickly. If you're unsure how much to get, start by picturing whether your usage is closer to "light," "moderate," or "I watch video too."
What can you do with 3GB?
3GB suits people who, on top of maps and messaging, browse social media and look things up every day. As a rough guide, for a travel style with around 30 minutes of social media a day plus everyday map and web searches, it can last several days to about a week. Posting photos and making occasional app-based calls are realistic too, as long as you keep it moderate.
That said, it may fall short if you watch a lot of long videos or rely on it as a stand-in for hotel Wi-Fi all day. If you want to watch video daily, take a look at the 5GB option or an unlimited plan below.
What can you do with 5GB?
5GB is a good fit for people who, beyond social media and browsing, also want to share photos and watch short videos now and then. It tends to match the need to "use my phone fairly freely" on a roughly one-week trip or stay.
Even so, if you watch high-quality video for long stretches every day, or keep a laptop tethered all the time, even 5GB can feel tight. In that case, an unlimited plan sized to the number of days you'll be away is worth considering. We'll touch on how unlimited works shortly.
Tips for saving data: making the same allowance last longer
- Use hotel and café Wi-Fi too: Save things like video, app updates, and photo backups for when you're on Wi-Fi to conserve data.
- Download video and music in advance: Save them over Wi-Fi before you leave and they won't use any data on the go.
- Save maps offline: Downloading your destination area in a map app ahead of time reduces data used during navigation.
- Turn off video autoplay and high quality: Reviewing autoplay and quality settings on social media can make a big difference to usage.
- Turn off automatic app updates: Disabling auto-updates over mobile data prevents usage you don't notice.
Keep these in mind and the same allowance can feel like it lasts considerably longer.
What if you run low? The reassurance of being able to add more
Even if you look likely to run low during your trip, there's no need to panic. With Bloomy, you can use a top-up to add data to the same eSIM (subject to a limit on the number of times). There's also an auto-recharge option that tops up automatically when your balance runs low; it starts switched off, so only those who want it need to turn it on.
You can check your remaining balance and QR code after purchase from My Account. The worry of "what if it's not enough?" shrinks when you can simply add more. That's exactly why you don't need to pick an oversized allowance from the start—starting with an amount close to how you'll actually use it is the safe, good-value approach.
Who are unlimited plans for?
For people who want to use their phone without watching the meter, an unlimited plan is another option. However, "unlimited" doesn't mean it's always high-speed no matter how much you use. Many unlimited plans may reduce speeds after a certain amount of use, and can have a fair-use policy or tethering conditions. Since the terms differ by plan and country, please check the latest details before you buy.
Unlimited tends to suit long study trips or people who use video and tethering every day, while a standard allowance-based plan is often plenty for a short trip focused on maps and social media. You can read more about how unlimited works in our unlimited eSIM articles or on the Bloomy Unlimited Max page.
Things to note: data-only plans and compatible devices
Bloomy's plans are generally data-only. App-based calls such as WhatsApp can work where data is available, but if you need voice calls over a phone number or SMS verification, it's wise to also line up an alternative (such as a local SIM or a plan that includes a number). For how phone numbers and SMS are handled, see our phone number & SMS articles as well.
Also, eSIM isn't supported on every device. Before buying, check whether your phone is compatible on our eSIM-compatible devices page.
How to choose the right amount with Bloomy
If you're unsure how much to get, our eSIM comparison page, where you can search plans by destination, data amount, and number of days, is handy. You can weigh up amounts like 1GB, 3GB, and 5GB against the number of days and pick what's closest to how you use your phone. Since you can top up if you run short, we recommend starting with a comfortable amount. Plan details and prices may change, so please check the latest information before you buy.
Summary: choose by working back from how you'll use it
As a broad guide: 1GB for light use centered on maps and messaging, 3GB for daily social media and browsing in moderation, and 5GB for photo sharing and the occasional short video too. Because usage shifts with apps and video quality, picture how you'll actually use your phone first, and choose on the assumption that you can add more if needed—that way you're less likely to get it wrong. As your next step, take a look at the comparison page for a plan that matches your destination and number of days. If you'd like to know about choosing factors beyond data amount, see our guide to choosing a travel eSIM.
