A family of four each with their own eSIM plan is four separate purchases. Sometimes that's the right answer. Sometimes a shared hotspot setup is cheaper. Here's how to think through it.
Do all four people need their own eSIM?
It depends on how you travel as a family. If everyone is on separate devices and frequently splits up - teenagers exploring independently, parents going different directions - individual plans make sense. Each person is autonomous and doesn't rely on staying near a hotspot device.
If you mostly travel together and the kids are younger, a single high-capacity eSIM plan on one device (usually a parent's phone), shared via personal hotspot, can cover the whole family more cheaply. A 20GB plan shared across four devices is often less than four 5GB plans individually.
The hotspot setup
Personal hotspot on iPhone: Settings → Personal Hotspot → Allow Others to Join. On Android: Settings → Connections → Mobile Hotspot and Tethering. Battery drain is the main downside - hotspotting burns through a battery noticeably faster than regular use. A portable battery bank addresses this.
Connection quality from a hotspot is slightly worse than direct cellular - there's an extra hop. For messaging and Maps it's imperceptible. For video calls or gaming, it can introduce some lag.
Kids and data
Children's data usage varies wildly. A ten-year-old watching YouTube in the hotel is a data vacuum. A fifteen-year-old with Instagram is similar. Factor this in honestly when deciding data allowances. If the kids are streaming video, add 1GB per hour of viewing to your estimate.
If you're giving children their own device with a separate eSIM, consider a low-data plan (2-3GB) that doesn't include a hotspot function - it avoids the situation where your child's plan gets used up in two days of YouTube.
What to buy
For a family of four with mostly shared activities: a 15-20GB plan on the primary device, shared via hotspot, plus a small 3-5GB backup eSIM on a second device in case the primary runs low or the group splits. This is often the most cost-effective setup.
For a family where members genuinely need independent connectivity: individual plans in the 5-10GB range each, depending on how long the trip is.
Practical family connectivity tips
Set up a family WhatsApp group as the default communication channel. It's free over data and works across all devices. Agree on a meeting point at every major location in case anyone loses signal or battery. Download offline Maps for everyone's devices before you leave, not just the parents'.