eSIM vs pocket WiFi for travel: cost, sharing, battery and which one to choose

eSIM or pocket WiFi: the short answer

A pocket WiFi (also called mobile WiFi, MiFi or WiFi egg) is a small battery-powered router with its own SIM card that you rent for your trip. A travel eSIM is a data plan you download to your phone. Both get you online abroad; they differ in almost everything else:

Whether your phone supports eSIM at all is explained in our compatibility guide; the basics of how a travel eSIM works are in what is an eSIM.

What each option costs

The two options are priced differently, so compare them for your actual trip rather than per day or per GB:

• Pocket WiFi: you pay for every day of the rental, whether you use much data or not, and the clock usually runs from pickup to return. Extras such as delivery, insurance against loss or damage and a power bank can add to the price.
• Travel eSIM: you pay once for a package, for example 10 GB for 30 days or an unlimited plan for a week. Unused days or data are not refunded, but there is no deposit and nothing to return.
• For one person, an eSIM is almost always cheaper, because a small package often costs less than a few days of rental.
• For a group, one router shared by several people can work out cheaper per person, but compare it with one eSIM per person or with one larger eSIM shared through the phone's hotspot.

For a sense of eSIM prices, here are the cheapest plans we track today for Japan, one of the countries where pocket WiFi rental is widespread:

Prices for every other destination are on our destination pages, and current discount codes on our promo codes page.

Travelling as a couple, family or group

Sharing is the main argument for a pocket WiFi, but a phone with a travel eSIM can share its connection too. In our database almost all plans allow hotspot use according to the providers; only a few exclude it, mostly certain unlimited plans. That gives you three ways to connect a group:

• One eSIM per phone: the best choice when people go their own ways during the day. Everyone has maps and messaging, and nobody uses up the others' data.
• One eSIM with a large package, shared by hotspot: works well for a couple or a family who stay together, for example to connect a child's tablet. Choose a fixed package or an unlimited plan with a high daily allowance, because the shared devices use the same data.
• A pocket WiFi: practical for a group that always stays together and has several devices without eSIM, such as laptops or older phones.

Keep in mind that unlimited plans usually have a daily allowance at full speed; several devices on one connection reach it quickly. How hotspot works and what to check is explained in our eSIM hotspot guide, and how daily allowances work in unlimited eSIM plans explained.

Data and speed: what you actually get

Both options run on the same local mobile networks, so the speed on the street is similar. The differences are in how the data allowance is shared and limited:

• Shared speed: every device connected to a pocket WiFi or a phone hotspot shares one connection. When several people stream or upload photos at once, each of them gets less.
• Daily limits: many pocket WiFi offers advertised as unlimited have a fair-use limit per day, just like most unlimited eSIM plans. Ask for the limit and the speed after it before you rent.
• Choice of network: eSIM plans state which networks they use, and many list more than one. With a rental router you usually get whatever network the rental company works with.

The table shows the cheapest unlimited eSIM plans we track for Japan by validity; the right-hand column only counts plans with at least 2 GB a day at full speed, which is the level to look for if several devices share one connection.

Laptops, tablets and phones without eSIM

A travel eSIM needs a compatible, unlocked phone or tablet. Some situations call for a different solution:

• Laptops: most laptops have no eSIM. Connect them through your phone's hotspot or a pocket WiFi; for heavy work, a USB connection to the phone is often the most stable.
• Tablets: many tablets with a mobile data option accept an eSIM, so they can have their own plan and stay online without a phone nearby.
• Older phones or phones locked to a carrier: they cannot use a travel eSIM. A pocket WiFi or a local SIM card is the alternative.
• Phones bought in mainland China, Hong Kong or Macau: some models have two physical SIM slots instead of eSIM; check the model before you buy a plan.

If several people in a group cannot use eSIM, a pocket WiFi is the simplest way to connect everyone. If only one device lacks eSIM, the hotspot of a phone with an eSIM is usually enough.

Battery, carrying and returning: the practical side

Beyond the price, a few everyday details often decide which option is more convenient:

• Battery: a pocket WiFi has to be charged every night and can run out during a long day of sightseeing. A phone used as a hotspot also drains faster, so a power bank helps with either option.
• One more device: the router has to be carried, kept dry and not forgotten in a restaurant or taxi. Loss or damage usually costs a fee.
• Pickup and return: rental counters at airports have opening hours and queues; returning by post or at a drop box before your flight needs planning. An eSIM has none of this.
• Several countries: a pocket WiFi is usually rented for one country or region. With an eSIM you can buy a regional plan for several countries, or a new plan for the next country in a few minutes.
• Your home number: with a pocket WiFi or an eSIM, your own SIM stays in the phone, so you can still receive calls and SMS codes; turn off data roaming on it to avoid charges.

Regional and global plans are compared in regional vs global eSIM, and how to keep your home number active in our dual SIM guide.

Which one should you choose?

Go through these questions in order; the first one that fits usually decides:

1. Does your phone support eSIM and is it unlocked? If not, choose a pocket WiFi or a local SIM card.
2. Are you travelling alone? Choose a travel eSIM; it is cheaper and simpler.
3. Will your group split up during the day? Choose one eSIM per phone.
4. Do you need to connect several devices without eSIM, such as laptops? A pocket WiFi, or one eSIM with a large package shared by hotspot.
5. Are you visiting several countries? A regional eSIM is usually easier than renting a router for each country.

Once you have chosen an eSIM, our guides explain how much data you need, when to activate it and how to install it on iPhone or Android.