co:sim review

Pros and cons

Who it suits

• Travelers choosing Simsima alternatives for broad eSIM coverage with hotspot sharing
• Travelers comparing USIMS for US network access through Verizon and AT&T
• Travelers comparing GlocalMe who prefer eSIM only use with instant activation

Who should look elsewhere

• Travelers wanting GlocalMe for device based connectivity rather than eSIM only data use
• Travelers wanting Simsima where a different entry price and plan mix fits better

Setup and top-up

You can stay online with data only eSIM access that supports instant activation before departure or after arrival. Hotspot sharing is supported, so a phone can share data with a laptop or tablet where the plan allows it. Top ups are available, which helps extend a trip without replacing the eSIM profile. The feature set covers unlimited data, 5G and hotspot, spanning unlimited data choice, 5G access, hotspot use and instant activation. That mix suits travelers who want to arrange connectivity in advance and manage extra data from account tools while away.

Price per GB and validity

Entry pricing begins at $0.79, which keeps initial costs modest for short visits and trial use. Reference plans span the US, Europe, Japan, Thailand, Spain, Mexico and a global option, giving choice across local style stays and broader itineraries. Travelers can compare allowance and validity inside each destination plan before purchase. That structure suits people who weigh entry price against destination needs, with scope to move from a shorter plan to broader regional or global coverage as plans require.

Speed and data limits

Unlimited data is available, which suits streaming, maps and remote work while traveling. Daily plans are subject to Daily plans throttled to 512Kbps after daily limit, so speeds slow after the daily allowance is used. 5G access is supported where networks and devices allow it, which helps with faster downloads and video calls before any limit applies. Travelers who need steady full speed access throughout the day should review allowance terms closely and consider larger allowances or top up options where offered.

Where it works

Coverage extends across 200, giving broad choice for varied itineraries across regions. In the US, service reaches travelers through Verizon and AT&T, with 5G availability where coverage and devices support it. Plan scope spans regional and global, covering regional options for grouped destinations and global options for wider travel. That mix suits travelers who visit several markets in a single trip and prefer to keep the same eSIM approach across borders.

How it compares on our data

On country coverage, co:sim holds position 9 among 260 ranked brands, reflecting broad destination reach. On entry pricing, the brand holds position 5 among 253 ranked brands, reflecting modest starting costs. Together, those placements describe a value led option that pairs wide availability with accessible entry pricing. Travelers comparing eSIM choices can use those placements alongside plan terms, validity and feature fit.

The company behind it

Service is offered by Comsand Inc., providing a clear operating name behind the eSIM product. The business base is in the United States, which gives travelers a clear home market for company terms. Support is offered through email, chat and phone, covering email, chat, phone and help centre resources. That range suits travelers who want several contact routes before travel and while abroad, from self help guides to direct assistance for orders and activation queries.

How co:sim compares

• 

  Simbye

  9.3 vs 9.3
• 

  Rova From Stc

  9.3 vs 9.3
• 

  Orbit Mobile

  9.3 vs 8.5
• 

  GlocalMe

  GlocalMe plans start at €1 for travelers comparing device led options with co:sim eSIM use

  co:sim vs GlocalMe9.3 vs 9.3
• 

  Roamable

  9.3 vs 9.5
• 

  Infimobile

  9.3 vs 8.0
• 

  BambooSIM

  co:sim vs BambooSIM9.3 vs 9.2
• 

  BreezeSim

  9.3 vs 9.0
• 

  eSIMony

  co:sim vs eSIMony9.3 vs 8.9
• 

  Roamic

  9.3 vs 9.5
• 

  Dingo

  9.3 vs 8.5
• 

  eSIMX

  9.3 vs 9.3
• 

  Bcengi TravelPass

  9.3 vs 8.9
• 

  Saily

  9.3 vs 8.8
• 

  Simsima

  Simsima plans start at $1.50 for travelers comparing low entry prices with co:sim

  9.3 vs 9.2
• SE

  Superalink eSIM

  9.3 vs 9.6
• A

  Airhub

  9.3 vs 9.5
• 

  AirZlink eSIM APP

  9.3 vs 9.5
• 

  JamboSim

  9.3 vs 9.3
• 

  Billion Connect

  9.3 vs 9.3
• 

  China Mobile HK

  9.3 vs 9.2
• 

  Gigago

  9.3 vs 9.2
• ET

  eSIM Thailand

  9.3 vs 9.2
• 

  Airalo

  9.3 vs 9.1
• EK

  eSIM Korea

  9.3 vs 9.1
• EE

  Europe eSIM

  9.3 vs 9.1
• 

  Flexiroam

  9.3 vs 9.0
• 

  Nomad eSIM

  9.3 vs 8.8
• S

  SmartRoam

  9.3 vs 8.7
• 

  EE

  9.3 vs 8.6
• 

  Holafly

  9.3 vs 8.6

Frequently asked questions

Sources

• cosim.io checked September 28, 2026

  Backs: Countries covered, Pricing model, Price from, Reference plan prices, Region

  “200+ Destinations”

• cosim.io/en/data-only/es checked September 28, 2026

  Backs: Features, 10 GB in Europe, Unlimited data

  “10GB $12.99”

• cosim.io/en/data-only/jp checked September 28, 2026

  Backs: 10 GB in Japan

  “10GB $1.50/GB $14.99”

• cosim.io/en/data-only/us checked September 28, 2026

  Backs: Audience, 5G, Networks, 10 GB in the US, Top-ups

  “Custom Duration: 1-365 Days”

• cosim.io/en/faq checked September 28, 2026

  Backs: Fair use policy, Hotspot sharing, Money-back period, Seller type

  “some are throttled to lower speeds (e.g., 512Kbps) after the daily limit”