We recommend using Truely eSIM which allows you to easily and cheaply connect to the local cell network wherever you travel - and avoid roaming charges. Truely specifically offers an option that includes all of Europe and the UK, and only costs about $2.50 per day (if you buy for 30 days). Click here to see how it works.
Check with your carrier about international roaming plans and what is included and not included.
SIM card: You can purchase a local SIM card in Spain. This requires an unlocked GSM phone.
Messaging
We encourage you to use Whatsapp for text messaging, this is what people in Europe use commonly. You can also use it for making calls on wifi.
Wi-Fi
Public wifi: Many cafes, restaurants, and hotels offer free wifi. This is a great option for basic tasks such as email and text messaging.
Apartment wifi: Your apartment will have high speed wifi that you can use for FaceTime and other messaging apps such as Whatsapp, iMessage, Zoom.
Download Offline Maps and Apps: Having offline maps and apps like Google Translate downloaded can be helpful if you lose signal or wifi access.
Local calls
You may need to call local businesses or people. We recommend that you use Whatsapp to make local calls, and to avoid incurring international calling charges.