When you travel, you've got three realistic ways to get mobile data: turn on your home carrier's roaming, buy a local SIM card at your destination, or install a travel eSIM before you go. Each has trade-offs in cost, convenience, and effort. This guide compares all three honestly, so you can pick what fits your trip. We'll also explain where a travel eSIM like Lumbus fits, it's designed to be the most convenient option, with instant delivery and prices up to 10x cheaper than traditional roaming.
Option 1: Carrier roaming
Roaming is the most convenient option in one sense, you do nothing, your existing plan just keeps working when you land. The catch is cost. Pay-as-you-go roaming rates from home carriers are often dramatically more expensive than local data, and it's easy to run up a large bill without realizing it.
Roaming makes sense for very short trips, or when you genuinely can't be bothered to set anything up. But for most travelers, it's the priciest way to stay connected.
- Convenient: nothing to set up, your number just works
- Expensive: rates are often far higher than local data
- Risk of bill shock if you forget to monitor usage
Option 2: Local SIM card
Buying a local SIM at your destination usually gets you the cheapest local rates and a local number. The downside is the hassle: you have to find a shop or airport kiosk, often queue, sometimes show ID or fill in paperwork, and physically swap out your home SIM, which means setting it aside and potentially missing calls and texts to your usual number.
There can also be a language barrier at the point of sale, and you're not connected until after you've landed and completed the purchase.
- Often the cheapest local rates
- Requires finding a shop, queuing, and sometimes paperwork or ID
- You must remove your home SIM and may miss calls/texts
- No connectivity until after you arrive and buy one
Option 3: Travel eSIM
A travel eSIM aims to combine the convenience of roaming with pricing closer to a local SIM. You buy a plan online before you travel, receive it by email instantly, and install it digitally, no shop, no queue, no swapping cards. Because it sits alongside your physical SIM via dual SIM, you keep your regular number active for calls and texts.
With Lumbus specifically, plans cover 150+ countries, activate in seconds, and are up to 10x cheaper than roaming. You can install before you leave and simply enable Data Roaming when you land. All plans support hotspot/tethering and run on 4G/LTE and 5G where available.
- Instant delivery by email, no queues, no paperwork
- Up to 10x cheaper than traditional roaming
- Install before you travel; connect the moment you land
- Keep your regular number active (dual SIM)
- One eSIM works across 150+ countries with Lumbus
Side-by-side: which should you choose?
There's no single right answer, it depends on how long you're away and how much you value convenience versus squeezing out the absolute lowest local rate.
As a rough guide: roaming suits ultra-short trips where you'll barely use data; a local SIM can be cheapest if you don't mind the legwork and a temporary local number; and a travel eSIM is the best balance for most travelers who want low cost without the hassle.
- Roaming: maximum convenience, highest cost, best for very short trips
- Local SIM: lowest local rates, most effort, you lose your usual number temporarily
- Travel eSIM: low cost and high convenience, set up before you go, keep your number
Why many travelers pick an eSIM
The deciding factor is usually that an eSIM removes friction at both ends of the trip. You set it up at home on WiFi, you're connected as soon as you land, and you avoid both the bill shock of roaming and the queue-and-paperwork of a local SIM.
If your device is eSIM-compatible and unlocked, it's hard to beat for a typical trip, you get competitive prices, instant activation, no signup, and 24/7 support if anything goes wrong.
Frequently asked questions
Is an eSIM really cheaper than roaming?
For most destinations, yes. Lumbus travel eSIM plans are up to 10x cheaper than traditional carrier roaming, because you're buying a prepaid local-network data plan rather than paying your home carrier's roaming rates.
Will I lose my phone number if I use a travel eSIM?
No. An eSIM works alongside your physical SIM via dual SIM, so you keep your regular number active for calls and texts while using the eSIM for data. This is a key advantage over swapping in a local SIM.
Can I set up a travel eSIM before I leave home?
Yes, and it's recommended. Install your Lumbus eSIM on WiFi before your trip, then just enable Data Roaming when you arrive. Your validity period only starts when you first connect at your destination, not when you install.
Do I still need my home carrier if I use an eSIM?
You can keep your home SIM for calls and texts on your usual number, and use the eSIM for data. To avoid roaming charges, keep Data Roaming off on your primary SIM and only enable it on your Lumbus eSIM.