Board Thread:Questions and Answers/@comment-26534870-20150626160455/@comment-24187738-20150626161128

Yes, you can transfer your account to his phone, and you can transfer it back after you get back from Spain. However, you cannot play on your phone while the account is still on his phone.

Transferring is also a bit more difficult if one of you is using iOS and the other is using Android. In those cases, all LoveCa must be cleared before transferring the account.