well In large parts of Europe (ie EU +EEA) roaming (at least for trips <3 months) local sim cards (unless you need to receive calls from the country in question and don't want the caller to pay international rates) are no longer needed because of Ru rules allowing evryone traveling to use ther phones abroad without additional charge (limited to 27GB /mounth (some other rules apply) to avoid people permanently roaming to get cheap data deals from low cos countries)Have you never traveled outside your home country? Getting a local sim is the best way to get local phone and data rates