Five years ago, I would have opted for cellular/Wi-Fi. Now, today, Wi-Fi is so widespread and free, it's widely available. It seems no matter where I go, there are even signs on businesses suggesting to use their free Wi-Fi. Years ago, I felt like businesses were so secretive about their Wi-Fi and not advertising it, but it's completely changed since then. It's almost a rarity to find a business or establishment that does not have Wi-Fi today.
Especially cafes, supermarkets & banks.