co:sim review

Updated September 30, 2026 · TariffCue Editorial Team · Facts checked September 30, 2026

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Our verdict

co:sim suits travellers who want a prepaid eSIM with wide reach and a low starting price, and plans open at $0.99. It is a data-only setup, so the eSIM, hotspot sharing and sim only options suit people who manage their own data rather than expect a handset with the plan.

Key facts

Best for
Travellers who want a prepaid eSIM covering many countries at a low starting price.
Seller type
Mvno (Source, checked September 30, 2026)
Host network
local carrier networks (Source, checked September 30, 2026)
SIM-only
Yes (Source, checked September 30, 2026)
Price from
$0.99 (Source, checked September 30, 2026)
Reference plan prices
Global (117 areas) unlimited daily data: $13.99, unlimited daily data, no contract, 1-365 days; Global (117 areas) 20GB 30 days: $135.99, 20GB total data, no contract; cheapest plan overall: single-destination Data Only eSIM from $0.99, data varies, no contract (no 12-month or 30GB+ plans listed) (Source, checked September 30, 2026)
Unlimited plan price
$13.99 (Source, checked September 30, 2026)
5G
Yes (Source, checked September 30, 2026)
eSIM
Yes (Source, checked September 30, 2026)
Roaming countries
200 to 240 (Source, checked September 30, 2026)
Hotspot sharing
Yes (Source, checked September 30, 2026)
Legal entity
Comsand Inc. (Source, checked September 30, 2026)
Headquarters
United States (Source, checked September 30, 2026)
Support channels
Email, Chat, Phone, Help-centre (Source, checked September 30, 2026)
Billing
Prepaid
Official website
cosim.io

Apps and profiles

Elsewhere
Trustpilot

Pros and cons

Pros

  • Entry at $0.99 puts co:sim at the front of the price ranking: 1 of 15.
  • Reach of 200 to 240 countries with hotspot sharing, so one data plan can carry a phone and a laptop across a long route.
  • Sim only eSIMs on prepaid billing, so nothing is locked into a contract before the trip: prepaid.
  • It operates as an MVNO on local carrier networks, while ESIMZON and KnowRoaming are resellers: reseller and reseller.

Cons

  • Billing is prepaid only, so a long trip has to be bought and paid for up front rather than spread over a contract.
  • Unlimited daily data costs $13.99 against an entry price of $0.99, so wide-area cover for a long route sits well above the figure a plan list opens with.
  • Of the email, chat and phone on offer, phone is the least common: 18.8% of the listings here include it, against 93.8% for the help centre.
co:sim

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Scored 9.4 / 10 by TariffCue.

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Who it suits

  • Travellers crossing several countries who want a prepaid eSIM and hotspot sharing.
  • People who plan their own data and pay as they go, since billing is prepaid with no contract attached.
  • Anyone with an eSIM-ready handset who wants a sim only plan.

Who should look elsewhere

  • Travellers after a named local partner in a single country, such as a Japan trip, where BambooSIM runs on Local partner networks, e.g. KDDI (au) and SoftBank in Japan.
  • Shoppers who prefer a reseller setup, since ESIMZON is reseller and KnowRoaming is reseller.
  • Buyers who want a monthly contract to renew: billing is prepaid, and the listed plans carry no contract.

Where it sits among rivals

On price, co:sim sits at the front: it ranks 1 of 15 on price from. Unlimited data tells a softer story, with co:sim ranked 4 of 7 on the unlimited price. Readers who budget from the figure a plan starts at will find co:sim easy to justify; readers who budget around unlimited daily data see a shorter field ahead of them and have reason to look elsewhere first. Neither ranking settles the value question, because a low starting price and a low unlimited price belong to different products. Both lines use the same measure across the same set of brands, so the gap between them reflects the plans behind each price rather than any change in method.

Pricing

A pair of figures carry the cost of a co:sim trip, and they buy different things. The floor is $0.99, which is where a plan listing begins, while unlimited daily data costs $13.99. Neither is an introductory rate with a larger renewal figure behind it: plans are sold for the period they cover rather than as a subscription, so the number quoted is the number paid. The distance between the two figures is the decision itself. The entry price keeps a short trip on a single destination inexpensive, while the unlimited price is the line to budget against when the same plan will be used across several areas.

What it does well

The catalogue is narrow in a useful way: sim only plans delivered as an eSIM, hotspot sharing on the data, and reach across 200 to 240 countries. Sim only is the point for anyone who arrives with a handset already and wants data rather than a new phone. eSIM delivery means the plan can be installed and used while travelling, with no card waiting in the post, and hotspot sharing lets a laptop or tablet ride on the same allowance. Coverage is the figure to check against an itinerary, and a route that steps outside 200 to 240 countries is a route that needs a different plan.

Who runs it

co:sim is run by Comsand Inc., based in the US, and that is the name appearing on the terms a buyer accepts. Support runs on email, chat and phone, covering self-service through the help centre and direct contact by email, chat or phone. The practical detail for a reader is that the counterparty on the paperwork is a named US company rather than a marketplace seller, and that help is available across several channels rather than a single route. For a trip bought on the move, the company details and the support mix are the parts worth reading before checkout.

How co:sim compares

Frequently asked questions

How much does a co:sim plan start at?+

The entry price is $0.99, and it belongs to a single-destination data-only eSIM rather than a wide-area plan. That makes it the figure that appears first in a plan list, but it is not the cost of staying online across a whole trip. Budget from the unlimited price for multi-country use.

How much is unlimited data on co:sim?+

Unlimited daily data costs $13.99. That plan covers a wide area list and runs without a contract, and it is the line most readers set against other sellers' unlimited plans. The gap between this figure and the entry price is the trade-off: unlimited removes the need to choose a data amount and moves the budget up.

Is there a contract and does the price rise at renewal?+

Billing is prepaid, and the listed plans carry no contract. That means there is no subscription to renew and no introductory rate that steps up later: the price quoted for a plan is the price paid for the period bought. Anyone wanting a rolling monthly bill will not find that structure here.

How many countries does co:sim cover?+

Coverage runs to 200 to 240 countries, wide enough for most multi-country trips. The check worth making is the itinerary against that list rather than a headline number, because a plan can look generous and still miss a place on a particular route. Data is sold for named areas, so anything outside the list is a separate buy.

Can I get an eSIM and share the data with a laptop?+

Yes on both counts. An eSIM is listed as available, and hotspot sharing works, so a phone can hand its connection to a laptop or tablet. Sim only is also offered, which suits travellers who bring their own handset and want data only. Delivery as an eSIM means the plan can be installed and used while travelling.

What support does co:sim give?+

Support runs on email, chat and phone, which covers email, chat, phone and a help centre. Email and the help centre are the broadest of those routes, while phone is the least used: 18.8% of the listings here carry it, against 93.8% for the help centre. Questions reach a named company rather than a marketplace seller.

Who is behind co:sim and where is it based?+

The service is run by Comsand Inc., based in the US, and that is the entity named in the terms. Co:sim also states its seller type as mvno, so it operates as an MVNO on local carrier networks rather than reselling another provider's plan. Buyers who want a counterparty on the paperwork have one here.

Sources

  • cosim.io checked September 30, 2026

    Backs: SIM-only

    “Instant activation, no physical SIM”

  • cosim.io/en/data-only/global-120 checked September 30, 2026

    Backs: Hotspot sharing, Reference plan prices, Unlimited plan price

    “Hotspot Sharing: Supported”

  • cosim.io/en/faq checked September 30, 2026

    Backs: ESIM, 5G, Host network, Seller type

    “eSIM doesn't require a physical card - you simply scan a QR code to install and activate it, no SIM swap needed”

  • cosim.io/en/policies/terms checked September 30, 2026

    Backs: Billing, Headquarters, Legal entity, Support channels

    “Data Only: Fixed data packages for specific destinations”

  • cosim.io/llms.txt checked September 30, 2026

    Backs: Price from, Roaming countries

    “2362 plans across 240+ destinations - Prices starting from $0.99”

Compiled from 5 source pages, checked September 30, 2026. We did not open an account.

Not confirmed yet: Contract length.

co:sim

co:sim

Travellers who want a prepaid eSIM covering many countries at a low starting price.

9.4/10Visit

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