Pocket wifi, travel eSIM or local SIM: which should you take?
A pocket wifi serves a whole group from one router, but you rent it, charge it and hand it back. For one person with a recent phone, a travel eSIM is usually cheaper and simpler.
What is pocket wifi and how does it work?
A pocket wifi is a small battery-powered router with its own SIM card inside. It picks up a mobile network and turns it into a wifi signal, so your phone, laptop and tablet connect to it the way they would to a hotel network. For travellers it is usually rented for the length of a trip and handed back at the end. A travel eSIM does the same job from inside your phone, with nothing to carry or return. A local SIM card does it with a plastic card bought in the country.
All three put you on a local mobile network. The difference is who carries the hardware, who pays for it, and how many people it serves. This page compares them on those terms. It is desk research: we read the rental company's and Apple's own pages on 9 November 2026 and did not test a pocket wifi ourselves.
Pocket wifi vs eSIM vs local SIM at a glance
| Pocket wifi | Travel eSIM | Local SIM | |
|---|---|---|---|
| What you carry | A router, its charger and often a power bank | Nothing extra | A plastic card, plus your home SIM somewhere safe |
| Devices served | Several at once over wifi | Your phone, others via its hotspot | Your phone, others via its hotspot |
| Bought | Usually rented, then returned | Online, before you fly | In the country, often with ID |
| Phone needs | Nothing, any wifi device works | eSIM support and no carrier lock | No carrier lock and a SIM tray |
| Main risk | Battery, loss fees, late return | Phone not compatible | Queues and paperwork on arrival |
When is a pocket wifi the better choice?
Three cases make a pocket wifi worth the bother.
Your phone cannot take an eSIM or a foreign SIM. Apple says a travel eSIM needs an iPhone XS, XS Max, XR or later, and that the iPhone cannot be locked to a carrier. A locked or older phone can still join a pocket wifi, because to the phone it is only a wifi network. The same goes for a laptop or tablet with no mobile connection of its own.
A group or family staying together. One router can serve several people, so one daily rate covers everyone. That only holds while you are together. The moment one person walks off with the router, everyone else is offline.
You want to choose the network. Some rental companies say which network a device uses. NINJA WiFi in Japan, for example, sells SoftBank plans and separate Docomo 5G options. Most travel eSIMs we track do not name a host network at all. Our Japan guide explains why that matters outside the cities.
When is a travel eSIM the better choice?
For most solo travellers and couples with recent phones, an eSIM wins on almost everything except group sharing. There is nothing to collect at the airport, nothing to charge at night, and nothing to post back. You install it before you leave and it connects when you land.
It is also usually cheaper for one person. Our cheapest eSIM ranking is built on price per gigabyte from sellers' own sites. In Japan, Nomad sold 10 GB for 30 days at $16 when we checked in August 2026. NINJA WiFi's own pricing article lists a 3 GB-a-day router at 770 yen a day, which it works out at 5,390 yen for a week, before any insurance. The router gives you far more data per day. The eSIM is a fraction of the price for normal use. We have not converted the yen figures, because exchange rates move; compare them on the day you buy.
You can still share an eSIM's data. A phone's personal hotspot turns it into a pocket wifi of sorts, though it drains the battery and depends on the plan allowing tethering. Our Airalo hotspot and Holafly hotspot pages cover what those two sellers say.
Check your handset first on our eSIM compatible phones list. If eSIM is new to you, start with what an eSIM is.
When does a local SIM card make sense?
When the price on the ground is low and you do not mind the paperwork. Japan is the example on this site: our research puts a typical airport SIM there at around $12, and a passport is required, as our Haneda Airport page sets out. In some countries a local SIM undercuts both a pocket wifi and an eSIM. The cost is time at a counter, and in some places a form and an ID check.
A local SIM also means taking out your home SIM, unless your phone has dual SIM. That has a side effect people forget: calls and texts to your home number stop until you put it back. On an iPhone XS or later, Apple says a physical SIM and an eSIM can be used together, which is one more reason the eSIM route is simpler.
What does a pocket wifi really cost?
The daily rate is only the start. NINJA WiFi's own article on pocket wifi costs is unusually open about the extras, and they are the kind of thing to look for at any rental company:
- Calendar days, not 24 hours. Collect on Monday evening, return Tuesday morning, and you pay for two days.
- Insurance. NINJA WiFi lists a full insurance plan at 330 yen a day and an insurance and battery plan at 440 yen a day.
- Late returns. An extension with a day's notice costs the normal daily rate. Without notice, it charges an extra 1,617 yen a day.
- Loss or damage. It lists 40,000 yen for the router itself.
- Returns by post. Sending the device back by delivery adds 550 yen.
- Speed limits. Even its unlimited plan may be slowed if you use roughly 10 GB in a day or 300 GB in a month.
None of those apply to an eSIM, which has no hardware to lose or return.
What about pocket wifi in the USA, Europe and Korea?
Search demand for pocket wifi in the United States, Europe and South Korea is large. We have not read a rental company's prices for any of them, so we will not quote one. The same trade-off applies everywhere: a router suits groups and locked phones, an eSIM suits one recent phone, and a local SIM suits anyone happy to queue. American carriers also sell their own mobile hotspot devices. Those run on your home plan, and whether they work abroad, and at what cost, depends on that plan. Ask your carrier.
For regional eSIMs, see our best eSIM for Europe and best eSIM for international travel pages, and the South Korea and USA guides.
Our verdict
If you travel alone or as a couple and your phones support eSIM, buy an eSIM and skip the router. If you travel as a family that sticks together, or someone's phone is locked, a pocket wifi earns its keep, as long as you budget for insurance and return it on time. If you are staying a while somewhere local SIMs are cheap, the counter is often the best value of all.
Common questions
What is pocket wifi?
A pocket wifi is a small, battery-powered router with a SIM card inside. It connects to a mobile network and shares that connection over wifi, so several phones, tablets or laptops can use it at once. Travellers usually rent one for a trip and return it afterwards.
How does pocket wifi work?
The router holds a SIM card on a local mobile network and broadcasts a wifi signal from it. Your devices join that wifi with a password, as they would at home. It runs on its own battery, so it needs charging each night, and everyone connected must stay within range of it.
Is pocket wifi or an eSIM better for international travel?
For one person with a recent, unlocked phone, an eSIM is usually cheaper and simpler: nothing to carry, charge or return. A pocket wifi is better for a group that stays together, for phones that cannot take an eSIM, and for laptops or tablets with no mobile connection.
Can I put a SIM card in a pocket wifi?
Rental pocket wifi devices come with their own SIM already inside, tied to the rental plan. Whether a router you own will take another SIM depends on the device and whether it is locked, so check with the maker or seller. We have not tested this.
Should I rent a pocket wifi or use my phone's hotspot?
If you already have an eSIM or local SIM with enough data, your phone's personal hotspot does a similar job at no extra cost, though it drains the phone's battery and the plan must allow tethering. Renting makes sense when no phone in the group has a suitable plan.
Sources and further reading
- The Real Cost of Pocket WiFi in Japan: Cheapest Options for TravelersNINJA WiFiRead 9 November 2026. Source for daily rates, insurance, late, loss and return fees, and the unlimited plan's speed limits.
- Use eSIM while traveling internationally with your iPhoneAppleRead 9 November 2026. Source for the eSIM model and carrier-lock requirements.
- Using Dual SIM with an eSIMAppleRead 9 November 2026