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You land, your phone buzzes with a welcome text, and a few days later the bill arrives. That’s roaming. An eSIM lets you skip it: you install a data plan on your phone before the trip, and it connects to a local network the moment you arrive. No plastic card, no queue at the airport kiosk.
Whether you need one depends on where you’re going. Europe and the UAE are almost opposite cases, so I’ll take them separately.
Europe: check your own operator first
Inside the EU, most mobile operators let you use your normal plan abroad at home rates, usually with a fair-use cap on data. If you have a Lithuanian SIM and you’re flying to Spain or Italy, you probably don’t need an eSIM at all. Open your operator’s roaming page and look at the cap before you spend anything.
An eSIM starts to make sense when you leave that zone. The UK, Switzerland, Turkey and the Western Balkans are the usual examples. Outside the bundle, data, texts and calls are billed at international rates, which is where the shock bills come from. It’s also worth a look if your own plan has a small roaming allowance, or if you’d like a separate data line so your main number stays untouched.
For regional plans, a few providers cover most of Europe in one package: Airalo, Holafly, Nomad, Saily and Ubigi are the names that come up in most comparisons. A few differences matter more than the brand:
- Country coverage. Regional plans range from about 35 to 42 countries, and the Balkans are where they differ. Some include them, some don’t, and Holafly’s plan only includes Croatia there.
- Throttling. Some “unlimited” plans slow down after a daily limit. Saily, for example, drops to about 1 Mbps after 5 GB in a day, while Holafly says it doesn’t throttle.
- Calls and texts. Most regional eSIMs are data only. Your own number still takes calls if the phone keeps its main SIM active, and apps like WhatsApp handle the rest in Europe.
Prices in the comparisons I read ranged from a few dollars for a small weekly plan to $26 to $49 for unlimited weekly data. Prices change often, so check the provider’s page on the day you buy.
The UAE: here an eSIM is the easy choice
Roaming from outside the Gulf tends to be expensive, and local SIM cards mean a trip to a shop and a passport check. An eSIM you install at home removes both problems. Two operators run the networks you’ll use: e& (formerly Etisalat) and du. Both cover Dubai and Abu Dhabi well. In the city, plan size matters more than which network you pick. The difference shows up once you leave the urban areas.
Of the options people usually compare, Nomad runs on du and Airalo on e&. Saily and Yesim are the other two that come up, mostly for larger data plans. Starter plans are cheap, around $4 in the guides I checked, and a 10 GB plan for 30 days was quoted at about $18.50 for Nomad. Treat those as a guide, not a quote.
How much data you need:
- A stopover of one to three days: 1 to 3 GB.
- A week with hotel Wi-Fi: 5 to 10 GB.
- Remote work or using your phone as a hotspot: 20 GB or more.
Two things catch people out in Dubai.
Calls over WhatsApp and FaceTime don’t work reliably. In the UAE, voice and video calls through those apps are blocked, because only approved VoIP services are allowed. Zoom, Teams and Webex are on that list, as is BOTIM. This is a regulation, not a flaw in any eSIM, so no provider can fix it. Messages and mobile data otherwise work normally. If you need to call home, use one of the approved apps or your normal phone line.
Install before you fly. Some providers warn that their websites may be hard to reach from inside the UAE. Scan the QR code and set up the plan at home, then switch it on when you land.
Before you buy, check three things
- Your phone supports eSIM and isn’t locked to your operator. Most phones from the last few years do, but some budget models don’t.
- The plan’s fine print on “unlimited”. Look for a daily speed limit.
- Whether you can use your phone as a hotspot. Not every plan allows it.
Which one should you pick?
For a short UAE trip, a small plan from either Nomad or Airalo is enough for most people. For a Europe trip outside the EU, pick a plan whose country list matches your route, not the one with the best name. And for most trips inside the EU, your own SIM is the cheapest option.
If you want somewhere to start, Saily has plans for both Europe and the UAE. Compare the country list and the daily speed limit against your route before you buy.
