How many GB do you need for a trip? (With unlimited, you stop counting)
Key facts
- There is no reliable universal data estimate for a trip, because video, navigation and photo backups vary wildly by traveler.
- VoaSim removes the guesswork with truly unlimited data: no cap, no throttling and no hidden fair-use clause.
- You pay by duration only, the same price for every destination: USD 18.90 for 5 days up to USD 106.90 for 60 days.
- Days start counting at the first connection at the destination, so install at home and keep the eSIM line off until you land.
- For very short, low-usage trips, a small package from a GB-based brand or your carrier's roaming add-on may still be cheaper.
See the exact price for your dates
"How many GB do I need for travel?" is the wrong question to have to answer before a trip. You cannot know in advance how many times you will reload Google Maps in a city with bad signal, how long the airport delay will be, or how many videos your family will send you.
This guide explains why GB estimates break down abroad, what actually drains data on a trip, and how to buy a plan without doing spreadsheet math the night before you fly.
Why GB estimates almost always miss
xWhat actually eats your data abroad
Three habits decide almost everything, and none of them are easy to predict from your couch at home:
- Video. Streaming, autoplaying feeds and video calls are in a different league from messaging. One long call home can outweigh a whole morning of maps.
- Navigation with a weak signal. When the phone loses and regains the network, apps reload. Walking tours in dense old towns do this constantly.
- Photo and cloud backup. Many phones upload every photo automatically. On a trip you take far more photos than usual, and the upload happens quietly in the background.
People also forget the shared reality of travel: your partner asks for the hotspot, the kids want cartoons on the train, and you tether a laptop for one urgent email. (Tethering support depends on the plan, so ask VoaSim support before you count on it.)
Add it up and the "safe" package you picked at home turns into a mid-trip top-up at 11 p.m. in a foreign hotel lobby.
The VoaSim answer: buy days, not gigabytes
VoaSim sells one thing: a travel eSIM with truly unlimited data. No data cap, no speed throttling after a threshold, no hidden "fair use" clause buried in the terms. There is nothing to estimate and nothing to top up.
The price depends only on how long the trip is, and it is the same for every destination in the catalogue: 170 destinations across every continent, including Brazil. The Europe plan covers 50 countries with a single eSIM, including Switzerland, the UK, Turkey, Norway and Iceland.
What it is not: it is a data-only product. You get no phone number and no traditional voice calls. In practice that matters less than it sounds, because WhatsApp, FaceTime, Telegram, Maps, Uber and email all run over data, and your own number stays alive on your physical SIM.
Run your dates through the price simulator and you get the exact figure in about a minute, with no GB decision to make.
Price by duration (today's promo, 15% off)
One price per duration, identical for every destination:
| Duration | Price | Per day |
|---|---|---|
| 5 days | USD 18.90 | USD 3.78 |
| 7 days | USD 23.90 | USD 3.41 |
| 10 days | USD 30.90 | USD 3.09 |
| 15 days | USD 42.90 | USD 2.86 |
| 30 days | USD 61.90 | USD 2.06 |
| 60 days | USD 106.90 | USD 1.78 |
Trips of 1 to 4 days pay the 5-day package. The maximum is 90 days per eSIM. A second eSIM in the same order gets 10% extra off, which is the simple way to cover a travel partner.
Payment is by international credit or debit card in USD through Stripe, with no hidden fees and an invoice by email. There is no early-booking discount on the English site: the table price is the price whether you buy three months out or at the gate.
When a GB-based plan is the smarter buy
Honest comparison: unlimited is not always the right answer.
If you travel for two days, keep the phone in airplane mode most of the time and only need maps and a boarding pass, a small GB package from a brand like Airalo, Nomad or Ubigi can cost less than any unlimited plan. Same story if your trip is mostly in hotels and cafés with reliable Wi-Fi.
Your home carrier can also win in specific cases. Plans such as T-Mobile's international options, AT&T International Day Pass, Verizon TravelPass or Google Fi bundle roaming into your existing line, so your number keeps receiving calls and SMS normally. Rates and daily allowances change by country and plan, so check the current terms in your carrier's app before deciding.
Unlimited wins when you cannot predict usage: long trips, multi-country routes, remote work, families sharing, heavy navigation, or anyone who hates watching a data counter. See the comparison pages and the roaming guide for the details.
Install it right so day one is not wasted
The QR code arrives by email within minutes of payment, with a WhatsApp heads-up if you left a number. Install it at home, before you fly, using the step-by-step guide for iPhone and Android.
The validity clock starts at the eSIM's first connection to a network at the destination, not at purchase. So after installing, leave the eSIM line switched off until you land. On Android in particular, do not turn on the eSIM's mobile data before the trip.
Check compatibility first: iPhone XR or newer, Samsung Galaxy S20 or newer, Google Pixel 3 or newer, and most phones released from 2020 on. The universal test is to dial *#06#; if an EID appears, your phone supports eSIM. Carrier-locked phones must be unlocked, and VoaSim does not sell physical SIM cards.
Landed and no signal? Work through the free eSIM Rescue tool, which diagnoses an eSIM of any brand. If the eSIM will not connect and support cannot fix it, you get a 100% refund.
A few coverage details worth knowing
Coverage is 170 destinations on every continent, with automatic connection to local partner networks on 4G and, where the network supports it, faster speeds. Two limits are worth writing down before you book:
- Island Caribbean is not covered right now — Dominican Republic, Cuba, Jamaica, Bahamas, Aruba, Curaçao and neighbours. Puerto Rico does work, because it runs on US networks.
- Cruises: the eSIM works on land, at the ports you visit. It does not work at sea, where only the ship's satellite service exists.
Your physical SIM and your number keep working alongside the eSIM, so WhatsApp stays on your usual number and your bank's SMS codes still arrive. Just turn off data roaming on your home carrier line so it never picks up the bill.
Questions before buying? Write to hola@voasim.com or use the on-site chat — real humans answer. You can also browse all destinations to confirm yours is on the list.
Why trust VoaSim?
Registered company with an invoice on every purchase, USD payment via Stripe with no hidden fees, human support and a guarantee: if the eSIM will not connect and support cannot fix it, you get 100% back.