When choosing an eSIM for a visit to your home country, the biggest question is usually "How much data should I buy?" The answer depends mainly on your daily usage × number of days you'll be there. If you'll primarily use maps, WhatsApp, and search, expect around 0.5GB per day. If you'll use social media or watch some video, plan for 1–1.5GB per day. For heavy video streaming, video calls, or tethering to other devices, budget around 3GB or more per day. Start by checking the quick reference table below to find where your trip length and usage habits meet.
- Your data needs are roughly: daily usage × number of days
- General guidance: 0.5GB/day for light use (maps, messaging), 1–1.5GB/day for social media and occasional video, 3GB+/day for streaming, calls, or tethering
- When in doubt, choose a larger plan; pick a validity period longer than your stay for peace of mind
- Phone calls and SMS verification aren't supported; messaging and calling apps that use data are fine
- If you run out, you can add more data; for extended or heavy use, consider an unlimited plan
Quick Data Capacity Guide by Trip Length
These are rough estimates based on multiplying your expected daily usage by your number of days. Actual consumption varies by app and video quality. If you're unsure, picking one size up usually gives you peace of mind.
| Trip Length | Light (0.5GB/day) | Standard (~1.5GB/day) | Heavy (3GB/day+) |
|---|---|---|---|
| 1 week (7 days) | ~3–5GB | ~10GB | ~10–20GB |
| 2 weeks (14 days) | ~7GB | ~20GB | Consider unlimited |
| 3 weeks (21 days) | ~10GB | ~30GB | Consider unlimited |
| 1 month (30 days) | ~15GB | ~45GB | Consider unlimited |
If you're not sure which profile fits you, think about how much video you typically watch on mobile data at home. If you stream video or use video calls frequently when you're away from WiFi, you're probably in the "standard" to "heavy" range. If WiFi is available most of the time and you mainly use maps and messaging outside, you're closer to "light." For specific plans and pricing, check the eSIM comparison page to match your trip length and data needs.
Plans tend to fill up faster than expected: you say yes to one more day trip, you meet up with someone you didn't plan to see, and suddenly you're out of the house far more than you imagined.
3 Factors That Affect Your Data Needs
Even with the same trip length, data requirements vary from person to person. Check these three things before you decide to reduce the risk of buying too little or too much.
1. How Much WiFi Will You Have Access To?
The more time you spend connected to WiFi—whether at your accommodation, a hotel, or a café—the less data your eSIM will consume. If WiFi is your primary connection, you might use less than the table suggests. By handling large downloads (like video streaming or app updates) over WiFi, you can save your eSIM data for calls, maps, and browsing while you're out.
There may be days when you're out more than expected, or your WiFi connection might be unstable. Choosing a plan with a bit of buffer means you won't be caught short if your usage is heavier than anticipated.
2. How Often Will You Stream Video or Use Video Calls?
Video streaming and video calls are the biggest data consumers. If you watch video during travel or have long calls with family, consider going up one capacity size to be safe.
3. Will You Use Tethering (Share to Other Devices)?
If you plan to share your phone's connection with a laptop or tablet, data usage can spike quickly. For tethering, choose a larger capacity or consider an unlimited plan. For a broader look at your connectivity options both at home and abroad, see the guide to connectivity solutions for travel and extended stays.
Daily Data Usage Guide by Activity
Getting a clear picture of how much data you use each day makes capacity planning much easier. These are typical estimates—actual usage depends on your network, video quality, and app settings.
| Usage Level | Main Activities | Daily Estimate |
|---|---|---|
| Light | Messaging, maps, search, email | ~0.3–0.5GB |
| Standard | Above + social media + occasional video | ~1–1.5GB |
| Heavy | Video streaming, video calls, tethering | ~3GB+ |
For example, if you're visiting for a week and mostly using messaging and maps outside, 3–5GB will often be enough. If you're visiting for two weeks and using social media and some video, 20GB is usually a safe bet. If you also stream video or use tethering, plan on about 10GB even for one week. In our own orders for Japan as of October 2026, 20GB for 30 days was the most common choice (10 of 22 orders), so many people go for a larger plan.
Looking at individual app usage can help you estimate your own habits.
| Activity | Estimate per Hour | Notes |
|---|---|---|
| Messaging apps (text-based) | Minimal | Usually just tens of MB per day |
| Voice calls over apps (WhatsApp, etc.) | ~20–40MB | Audio only, far lighter than video calls |
| Maps and navigation | ~Tens of MB | Adds up if you travel a lot |
| Social media (mostly images) | ~Hundreds of MB | More if there's a lot of video content |
| Music streaming | ~100MB or so | Much less if you download for offline playback |
| Video streaming (standard quality) | ~0.5–1GB | Higher with HD or 4K |
| Video calls | ~0.5–1GB | More with longer sessions |
On heavy video or video call days, you can easily use 1GB+ just on those activities. On light days—mostly messaging and maps—you might be surprised how little you actually need.
Bloomy eSIM Plans and How to Choose Your Capacity
Bloomy offers data-only eSIM plans for your visit home. Here are some typical options (for the latest plans and pricing, check the comparison page).
| Capacity | Validity | Best For |
|---|---|---|
| 1GB | 7 days | Very light use or as a backup |
| 3GB | 30 days | Short trips with light use or heavy WiFi access |
| 10GB | 30 days | 1–2 weeks of standard use |
| 20GB | 30 days | 2 weeks to 1 month of moderate to heavy use |
| 50GB | 30 days | 1 month with generous data use |
The key is to find a plan near your estimate from the quick reference table, and bump up one size if you're on the fence. Validity matters too—choose a plan that lasts a bit longer than your stay, so you're not rushed on your arrival or departure days. Before purchasing, verify that your device supports eSIM using the eSIM compatibility checker.
When You Might Need a Larger Plan
- You're traveling often and use video or video calls regularly on mobile data
- Your accommodation has no WiFi or unreliable WiFi
- You're not sure how much you'll use and want to be safe
When a Lighter Plan Usually Works
- You mainly use messaging, maps, and searching—light browsing
- You have reliable WiFi at your accommodation and use it often
- Your visit is short and you're not planning heavy data use
If you'll be working remotely during your stay, video meetings and tethering make your usage especially hard to predict, so it's worth looking at high-capacity or unlimited-style plans.
Important Notes About Data-Only eSIM (No Phone Number or SMS)
Just as important as capacity is understanding that Bloomy provides data-only service. There is no phone number, SMS (text message) capability, or voice calling. This is important to understand before you buy, because it can affect how you stay connected during your stay.
- No phone number. You cannot make or receive calls using a traditional phone number (like numbers starting with country codes).
- No SMS." You cannot receive SMS verification codes. If your home country's banks, government services, or apps require SMS one-time passwords, you'll need another way to receive those.
- Data calling and messaging apps work fine." You can use WhatsApp, Messenger, FaceTime, and other apps that rely on data. These work normally as long as you have an internet connection. The only thing you can't do is traditional phone calls and SMS.
If you think you might need SMS verification or a phone number during your visit, consider keeping a plan with a number from your home country or getting a SIM with phone number support alongside your eSIM. For more details on managing your number and using data-only options, see the phone number and SMS guide. If you live abroad and want to keep your home country number while using eSIM data, the guide to staying connected when visiting your home country covers that combination. The easiest approach is to think of it as "data plus a separate solution for your number."
The usual approach is to leave your existing line active so you keep your home-country number, and add a data eSIM for the country you're visiting, using each for what it does best. On an eSIM-capable phone you can add that second line without swapping out your physical SIM, so there's no risk of losing the small card you need back home.
Unlimited Plans for Heavy Use and Longer Stays
If you'd rather not worry about data limits or plan to use tethering heavily, unlimited plans are worth considering. Keep in mind that typical daily-type unlimited plans (the kind that slow down for the rest of the day once the day's high-speed data is used up) include speed restrictions after a certain threshold, fair-use policies, and conditions on tethering. "Unlimited" doesn't mean "completely unrestricted"—it's important to check the details before you buy. Bloomy Unlimited Max is different: there is no slowdown based on how much data you use.
You can learn more about premium unlimited options and their conditions on the Bloomy Unlimited Max page. That said, for most visits, a capacity-based plan matched to your usage is often more affordable and does the job perfectly. Compare your trip length and expected usage to decide what works best for you.
Simple ways to make your data last
Even on a smaller plan, a few habits stretch your allowance a long way.
- Lean on Wi-Fi where you're staying: batch your streaming, app updates, and photo backups for when you're connected
- Set app updates to Wi-Fi only: this alone prevents the biggest silent data drains
- Lower the video quality in your streaming apps: dropping to standard definition makes a dramatic difference
- Download map areas in advance: save the neighbourhoods you'll spend time in while on Wi-Fi, and navigation costs almost nothing
Checking your phone's data usage screen every few days is a small habit that keeps the back half of your trip stress-free.
If You Run Out of Data or Have Connection Issues
If you use more than expected, don't worry. Bloomy lets you add data to your eSIM on the fly. If you're concerned about running out, it's helpful to know your options before you arrive (details on how to add data and auto-recharge options are in the data top-up guide).
You have two approaches: if you're uncertain about usage or travel frequently, start with a generous capacity or consider unlimited for longer stays. If your normal use is light but you want a safety net, begin with a standard plan and add data if needed.
If you notice you're not connecting, first try turning airplane mode on and off. Next, check your mobile data and data roaming settings, and confirm you've selected the right network. Most issues resolve once you adjust these settings. For setup guidance, see the setup guide. For detailed questions, visit the FAQ. To compare plans and prepare for your trip, use the comparison page to browse options that match your stay and capacity needs.
Plans, capacity, and terms may change. Check the comparison page for the most current information before you purchase.
eSIM guides for popular destinations
- eSIM guide for South Korea (prices, networks, setup)
- eSIM guide for Thailand (prices, networks, setup)
- eSIM guide for United States (prices, networks, setup)
- eSIM guide for Australia (prices, networks, setup)
- eSIM guide for Canada (prices, networks, setup)
