By Dhillon Dhadda, Travel Advisor, Roseville Travel
Choosing between a carrier day pass and a travel eSIM is a cost question, and we cover it separately. This is the other half: what to actually set up on the phone before you leave, most of which people only think about once something has gone wrong.
Twenty minutes at home saves a bad afternoon abroad.
Download offline maps before you go
The single most useful thing on this page.
Google Maps and Apple Maps both let you download a region for offline use. Do it on home WiFi for every city on your itinerary, plus the drive between them.
Offline maps still give you GPS position, walking directions and saved places with no signal at all. The first time you come out of a metro station in a city where you cannot read the alphabet, this is the thing you will be grateful for.
While you are at it, drop pins on your hotel, the airport terminal and the station. Searching for an address is much harder when you are lost than when you are sitting at home.
The two-factor problem
This catches more travellers than any other single thing, and it happens at the worst moment ; standing at an ATM or trying to check into a flight.
Your bank, your airline and your email want to send a verification code to your US number. If that number is unreachable, you are locked out of your own accounts on another continent.
Three fixes, all done before you fly:
Move critical accounts to an authenticator app rather than SMS codes. App-generated codes work with no signal whatsoever. This is the real solution.
Keep your US line active and able to receive texts, even if your data runs through a travel eSIM. This is a strong argument against swapping in a physical local SIM, which takes your number offline.
Tell your bank you are travelling, and carry a second card from a different institution, kept somewhere separate from the first.
Photo backup that survives a stolen phone
Set your phone to back up photos automatically over WiFi — iCloud, Google Photos, whichever you already use — and confirm it is actually running before you leave.
The point is not storage. The point is that a phone lost in a taxi in Lisbon takes two weeks of photographs with it unless they are already somewhere else. Check the setting; do not assume it is on.
If you are shooting on a real camera, carry a second memory card and swap it halfway through the trip. Two cards in two bags means one loss is not total.
Battery
Phones drain faster abroad — maps running, roaming, cold weather, and no chance to charge between eight in the morning and eight at night.
Carry a power bank of 10,000mAh or more. Note that airlines require lithium batteries in carry-on, never checked, and there are capacity limits, so keep it in your day bag.
Bring a multi-port charger and the right plug adapter — Europe uses Type C/F, the UK and Ireland Type G, and they are not the same. One adapter with several USB ports beats four separate bricks.
Apps worth having before you fly
- WhatsApp. Outside the US this is simply how people communicate. Your hotel, your driver and your guide will all want to use it.
- Your airline's app, for gate changes and rebooking, which is faster than any queue.
- A translation app with the offline language pack downloaded — camera translation of menus and signs is genuinely transformative.
- Your bank's app, so you have a non-SMS route in.
- A currency converter that works offline.
Security while you are out
Turn off automatic connection to open WiFi networks. Use your own data for anything involving a password or a payment; treat café and airport WiFi as public.
Keep the phone out of a back pocket and off restaurant tables in busy tourist districts — phone theft is opportunistic and fast in a handful of European cities.
Turn on Find My iPhone or Find My Device, and know your passcode rather than relying on Face ID, which fails in strong sunlight and behind sunglasses more often than you would expect.
One thing not to do
Do not spend the trip photographing it. The clients who come back happiest are the ones who took fewer, better pictures and looked at the thing in front of them.
If you are still deciding between a carrier day pass and a travel eSIM, that is a cost question and our sister site Woodland Travel runs the numbers on it. And while you are working through the practical layer, what travel insurance actually covers belongs on the same pre-departure list — particularly the part about buying it early.
Call Roseville Travel at (916) 782-6363 and we will send the full pre-departure checklist with your itinerary.