Yes, you can travel with just your phone for most of a trip in Europe. Put your bank card on your phone and leave the wallet at home, but still pack your identity card, one physical bank card and a little cash. Your phone already handles payments, boarding passes, train tickets, hotel bookings and public transport through Apple Wallet, Google Wallet or Samsung Wallet. It cannot yet replace your identity card or passport, a physical credit card for car hire deposits, or cash for places that do not take cards. This guide shows how to set it up before you leave Belgium, what to pack, how much mobile data phone only travel really uses, and how an eSIM keeps the whole setup working.
What your phone already replaces when you travel
For most Belgian travellers, the phone has already taken over the wallet, whether on a last minute city trip or a longer holiday:
Payments: pay with your phone on almost every contactless terminal in Europe, from supermarkets to museums.
Flights: save your boarding pass in Apple Wallet or Google Wallet.
Trains and public transport: use digital tickets or tap your phone at the gate in many cities.
Accommodation: keep booking confirmations, and in some hotels even the room key, in an app.
How to pay with your phone abroad
Pay abroad exactly as you pay at home. Your phone uses the bank card you already have, so the fees and exchange rates of that card still apply.
Set it up before you leave
Add your bank card to your phone wallet. Open Apple Wallet, Google Wallet or Samsung Wallet, or your banking app, and follow the steps. Most major Belgian banks support Apple Pay and Google Pay.
Test it at home. Make one small contactless payment before your trip, and abroad, always choose to pay in the local currency.
Keep your banking app ready. Some payments ask for approval in the app, which needs a working connection.
Abroad, use the card in your phone wallet rather than Payconiq, which is becoming Wero in 2026 and works mainly in Belgium and a few European markets.
What your phone cannot replace yet
Your identity card or passport
Pack your identity card or passport. Airlines, border guards and hotels still ask for a physical identity document. Belgium has announced a digital identity card in the MyGov.be app, expected in the course of 2026 and intended to work for travel within the Schengen area, but it is not live yet and the physical card will stay. Outside Schengen, you will usually need a passport.
A physical card for deposits and backups
Bring one physical bank card and keep it separate from your phone. Car rental companies usually ask for a physical credit card in the driver's name for the deposit, and some ATMs do not support contactless cash withdrawal.
Some cash
Carry a little local cash. Small restaurants, markets, taxis and tips can still be cash only, especially outside big cities.
The real weak point: battery and connection
Bring a power bank and plan your mobile data. When your phone is your wallet, your ticket and your map, losing it or running out of battery means losing all three at once.
Contactless payments often work offline, but bank approvals, ride apps, maps and messages to your accommodation all depend on mobile data. Inside the EU, roam like at home rules let you use your Belgian plan without extra charges. Outside the EU, in countries such as Morocco or Albania, roaming can quickly become the most expensive part of the trip.
How much mobile data do you need to travel with just your phone?
Very little. A full day of maps, messages, a couple of rides and payments usually stays under 100 MB, as long as you avoid video. Typical figures:
Navigation: Google Maps uses about 3 to 5 MB per hour, or 7 to 10 MB with live traffic.
Messages: a WhatsApp text uses under 1 KB, a photo 100 to 500 KB, and a voice call 0.3 to 0.5 MB per minute.
Boarding passes and tickets: well under 1 MB to download, and nothing once saved in your wallet app.
Ride apps and bank approvals: usually a few MB per ride and a fraction of an MB per approval.
Video is what drains data: a WhatsApp video call in HD can use up to 480 MB per hour. For light use, around 1 GB covers a week, so what you need is not a big bundle but a connection that works when you land.
Why an eSIM makes phone only travel work
Install a travel eSIM before you leave. An eSIM is a digital SIM card built into your phone: you download it instead of buying a plastic SIM card after you land, and your phone connects to a local network as soon as you arrive. Your Belgian SIM can stay active next to it, so people can still reach you on your own number.
A travel eSIM from Firsty gives you mobile data abroad without switching SIM cards or relying on expensive roaming. Before you go, check that your device is on the list of eSIM supported phones.
A smart phone first packing list
Your phone, with your bank card added and tested
A power bank and a charging cable
Your identity card or passport
One physical bank card, stored away from your phone
A small amount of local cash
Boarding passes, tickets and maps saved offline
A travel eSIM installed before departure
Travel lighter, stay connected
Stay connected from the moment you land. With Firsty there is no SIM card to swap, no roaming setting to remember and no shop to find at the airport, and your own number stays reachable. Every connection Firsty sells also connects someone in Belgium who needs one, not as charity, but as how the business works. Things are moving, so keep an eye on what Firsty is building and discover more at Firsty.app.
FAQ
Can you travel with just your phone?
Yes, for most things inside the EU. Your phone can handle payments, boarding passes, train tickets and hotel bookings. You still need a physical identity card or passport, one physical bank card as a backup or for car hire deposits, and some cash for places that do not accept cards.
Can I pay with my phone abroad?
Yes. Add your bank card to Apple Wallet, Google Wallet or Samsung Wallet and you can pay on almost any contactless terminal abroad that accepts that card. The fees and exchange rates of your own bank card apply.
How do I put my bank card on my phone?
Open Apple Wallet, Google Wallet or Samsung Wallet, or your banking app, and follow the steps to add your card. Your bank verifies the card, usually with a code or a confirmation in its app. Most major Belgian banks support Apple Pay and Google Pay.
Does paying with your phone work without internet?
Often, yes. A contactless payment happens between your phone and the terminal, so it usually works offline. Bank approvals, maps, ride apps and some digital tickets do need mobile data.
Is paying with your phone safe?
Yes, it is generally considered at least as safe as paying with a physical card. Your real card number is not shared with the shop, and each payment must be confirmed with your face, fingerprint or phone code.
Can I use a digital identity card when travelling?
Not yet. Belgium has announced a digital identity card in the MyGov.be app, expected in the course of 2026 and intended to work for travel within Schengen, but the physical card will remain in use. Until the digital version is live and accepted, bring your physical identity card or passport.
How much data do I need when travelling with just my phone?
Around 1 GB for a week of light use. Google Maps navigation uses about 3 to 5 MB per hour, a WhatsApp voice call 0.3 to 0.5 MB per minute, and a saved boarding pass uses no data at all. Video calls are the exception: an HD WhatsApp video call can use up to 480 MB per hour.
What is an eSIM and why is it useful when travelling?
An eSIM is a digital SIM card built into your smartphone. Install a travel eSIM, such as one from Firsty, before you leave, and your phone has mobile data as soon as you land without buying a local SIM card. Your Belgian SIM can usually stay active at the same time.
Should I choose euros or local currency when paying abroad?
Choose the local currency. When a terminal abroad offers to charge you in euros, the conversion rate it uses is usually less favourable than the rate your own bank applies.
