Pocket Wifi or an eSIM?

A pocket wifi is a rented battery-powered router with its own data plan, collected at an airport or posted to your hotel. An eSIM is a profile you download onto the phone you already carry. For one traveller with a recent phone, the eSIM wins on almost every axis.

For a family of four, or on a phone that cannot take an eSIM, the answer genuinely flips — which is why this comparison is worth doing properly rather than assuming.

For a solo traveller these advantages compound rather than merely adding up:

• Nothing to collect and nothing to return. No queue on arrival, no deposit, no posting a device back and hoping it arrives.
• Nothing extra to charge. A pocket wifi is a second battery to manage, and it dies first because it is working hardest.
• Nothing to lose. Losing a rented router means paying for it; a downloaded profile cannot be mislaid, and Apple notes that an eSIM cannot be removed from a phone that is lost or stolen the way a plastic card can.
• Your phone keeps working when you walk away from your bag. A hotspot in a hotel room is a hotspot you are not carrying.
• Cheaper, for one person, essentially always.

Two cases, and they are real:

1. 1Group travel. One rental typically connects five to ten devices on one allowance. Four travellers each buying a 5 GB plan is four purchases; one pocket wifi is a single bill split four ways, and the arithmetic often favours the router — until you size the shared allowance against four people’s real usage.
2. 2A phone that cannot take an eSIM. If the dialler check finds no EID, the question is settled — a rented hotspot works with any device that has wifi.

A locked phone lands in the same place as the second case, and it is the more common of the two. Worth checking before you rule anything out, because unlocking is usually free and takes a day or two.

The pocket wifi case is weaker than it first looks, for one reason people forget: everyone has to stay together. The moment the group splits for an afternoon, whoever does not have the router has no data at all.

Compare the whole thing, not the daily rate:

• Insurance or a damage waiver, frequently pushed at collection and rarely in the advertised price.
• A deposit held against the device, sometimes for weeks after return.
• Late-return fees, which are easy to trigger on a delayed flight home.
• Overage charges once the shared allowance is spent — a group gets through data faster than any one person expects.

Travelling alone with an eSIM-capable, unlocked phone: buy an eSIM. Travelling as a group that stays together, or carrying a phone that cannot take one: price the rental properly and it may well win. If it is the first, plans by destination, ranked on price per GB.