My question concerns entering EU via Sweden to get to Helsinki, I have given all the documents (invitation, contract of my house, bank account, etc.) to my friend. She has printed all of them. I have also bought a ticket to London to get out of the Schengen area, but the insurance is not printed; she has it in her phone to display. Could there be problems with Swedish customs since that is not on paper but on her cellphone?
EDIT: Sorry I misspoke; as Mexicans, we do not require visas to enter the EU, but the Schengen area asks for insurance.
EDIT2: I want to wait until it has passed to see who got the correct answer :)