Airalo is an eSIM marketplace founded in 2019 that now serves more than 20 million customers across 200+ countries and regions. You buy a plan, scan a QR code, and your data connection is ready before you've even landed.
I've heard it from people I've met at hostels across three continents: Airalo just works. Reasonable speeds, no surprise charges, and support that picks up when something goes sideways. Most plans are data-only, so calls go through WhatsApp, FaceTime, or Skype.