Cosmote eSIM plans in Greece start at just €2 ($2.15) for one day of unlimited data, with monthly options up to 70 GB for €32.40 ($34.70). In this review, we cover Cosmote’s pricing, data, coverage, features, and customer feedback, plus alternatives if you need global connectivity.
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Cosmote, Greece’s largest mobile operator, makes it easy to stay connected with flexible eSIM options for tourists and residents.
Prepaid users can get unlimited data for a day at €2 ($2.15) or monthly plans like 4 GB for €8.50 ($9.10) and 9 GB for €11.50 ($12.30). Postpaid users benefit from bigger data bundles, such as 70 GB for €32.40 ($34.70), with unlimited calls and thousands of SMS included.
Cosmote also offers a Travel Pass to extend your plan to 125+ countries.
In this Cosmote eSIM review, we look at pricing, how to get and activate your eSIM, coverage, customer reviews, and the best alternatives.
Cosmote initially offered only traditional SIM cards, but since 2020, it has also made eSIM available for both prepaid and postpaid plans. This gives customers more flexibility in how they connect, whether they prefer a physical SIM or eSIM.
Cosmote is one of Greece’s leading telecommunications companies and is a subsidiary of the OTE Group, which is itself owned by Deutsche Telekom.
Established in 1998, Cosmote quickly became a dominant player in the Greek telephone market and is known for its extensive network coverage and wide range of mobile services, with everything from Cosmote internet to Cosmote phone plans.
You can get a Cosmote Greece eSIM after you arrive in Greece. You’ll need to get a physical prepaid SIM first, and then you can convert it into an eSIM. Here’s how:
You can also do this by calling Cosmote customer service at 13888. You’ll still need a prepaid physical SIM card before you make the switch, and a conversion fee will still apply.
Another option is to purchase a new device from Cosmote and request an eSIM with it. However, for this option, you’ll typically need a Greek address for billing purposes.
Keep in mind that there are specific requirements for getting a Cosmote eSIM:
Cosmote’s eSIM is compatible with many phones, laptops, smartwatches, etc. A Cosmote eSIM will work on devices like:
Before purchasing an eSIM, it’s a good idea to ask Cosmote directly if their eSIM supports the device you have. Also, make sure your device is not carrier locked.
Activating your Cosmote eSIM is a straightforward process, no matter what device you’re using. You’ll need to request an eSIM from Cosmote, and they will then send you a QR code.
After that, setup depends on whether you’re using an iPhone or an Android. You can find specific instructions for your device below.
To activate your eSIM on an iPhone, follow these steps:
Steps to activate your eSIM on Android can differ depending on your device, but as a guide, these are the general steps you’ll need to follow:
Cosmote eSIM is a great option for travelers, digital nomads, and locals, thanks to its affordable and flexible plans that can include data, calls, and SMS.
You can also stay connected abroad using Cosmote’s roaming options and Travel Pass plans. More importantly, Cosmote Telekom has been recognized by Ookla® as having the fastest mobile network in Greece for nine consecutive years, with extensive 5G coverage both within Greece and globally, so you can expect minimal connectivity issues.
Setting up your Cosmote eSIM might seem daunting at first, especially since the website is primarily in Greek. However, both the website and app have English translations, making the process much easier, even if the translations aren’t perfect.
Overall, a Cosmote eSIM is a solid choice, as Cosmote is one of the largest network providers in Greece, guaranteeing strong coverage and reliable connectivity.
Cosmote has a wide array of postpaid and prepaid plans that are all available in both SIM card and eSIM formats. These plans can include data, calls, and SMS, depending on your package.
Keep in mind that Cosmote makes its prepaid offers available on a separate platform called WHAT’S UP. Below are some data plans currently being offered by Cosmote:
Postpaid Cosmote eSIM plans (GIGAMAX)
| Data allowance | Calls | SMS | Duration | Price* |
| 4 GB | Unlimited minutes to local networks | 2,000 SMS to all networks | Monthly | €18 EUR |
| 9 GB | Unlimited minutes to local networks | 2,000 SMS to all networks | Monthly | €21.60 |
| 18 GB | Unlimited minutes to local networks | 2,000 SMS to all networks | Monthly | €25.20 |
| 35 GB | Unlimited minutes to local networks | 2,000 SMS to all networks | Monthly | €28.80 |
| 70 GB | Unlimited minutes to local networks | 2,000 SMS to all networks | Monthly | €32.40 |
| Unlimited + 3 Travel Passes** | Unlimited minutes to local, Europe, the US, and Canada | 2,000 SMS to all networks | Monthly | €36.90 |
*Prices are based on having a fixed-line connection with a 10% discount applied. Without this, the cost will be higher.
**The Cosmote Travel Pass lets you use your existing voice, data, and SMS allowances abroad in over 125 countries for a small daily fee and only on the days you use roaming services.
Prepaid Cosmote eSIM plans
| Data allowance | Calls | SMS | Duration | Price |
| Unlimited | - | - | 1 day | €2 |
| 2.5 GB | Unlimited minutes to all networks | 600 SMS to all networks | 1 month | €13.50 |
| 4 GB | - | - | 1 month | €8.5 |
| 9 GB* | 1,500 minutes to local networks | 300 SMS to all networks | 30 days | €11.50 |
*Plan for students.
Keep in mind that packages are categorized into speech, data, and SMS packages, so you can choose the type that best fits your needs or combine them for a more complete plan.
Cosmote eSIM has excellent coverage in all of Greece. You can also use Cosmote to stay connected abroad with its data roaming plans and Cosmote Travel Pass.
Cosmote Travel Pass, for example, allows you to extend your local tariff plan to more than 125 countries, as listed below.
| Travel Pass zone | Daily price | Countries covered | |
| COSMOTE Travel Pass Zone A | €7.69 | Albania, Andorra, Argentina, Australia, Belarus, Bolivia, Bosnia Herzegovina, Brazil, Canada, Chile, China, Colombia, Costa Rica, Dominican Republic, Ecuador, El Salvador, Greenland, Guatemala, Guernsey, Honduras, Hong Kong, Faroe Islands, Indonesia, Isle of Man, Israel, Japan, Jersey, Jordan, Kosovo, Kuwait, Malaysia, Mexico, Moldova, Montenegro, Morocco, New Zealand, Nicaragua, Ν. Macedonia, Palestine, Panama, Paraguay, Peru, Philippines, Qatar, Serbia, South Africa, South Korea, Sri Lanka, Switzerland, Thailand, Turkey, Ukraine, Uruguay, USA, Vietnam | |
| COSMOTE Travel Pass Zone B | €14.29 | Afghanistan, Algeria, Angola, Anguilla, Antigua, Armenia, Azerbaijan, Bahrain, Bangladesh, Barbados, Botswana, Brunei Darussalam, Burkina Faso, Cambodia, Cameroon, Cape Verde, Cayman Islands, Central African Republic, Congo, Congo Republic, Dominica, Egypt, Gabon, Gambia, Georgia, Ghana, Grenada, Guyana, India, Iraq, Ivory Coast, Jamaica, Kazakhstan, Kenya, Kiribati, Kyrgyzstan, Laos, Liberia, Macao, Mali, Mauritius, Mongolia, Montserrat, Nepal, Neth. Antilles – Curacao, Neth. Antilles - St. Maarten, Niger, Nigeria, Oman, Pakistan, Papua New Guinea, Puerto Rico, Russia, St. Lucia, St. Vincent & Grenadines, Samoa, Saudi Arabia, Senegal, Sierra Leone, Singapore, Sudan, St Kitts, Swaziland, Taiwan, Tajikistan, Tanzania, Togo, Trinidad & Tobago, Turks & Caicos, Uganda, United Arab Emirates, Virgin Islands (USA) | |
For other roaming services, here are the basic charges for data roaming with Cosmote eSIM.
| Zone | Data €/ΜΒ |
| Ζone 1 (EU) | Embedded usage consumption |
| Zone 2 (NEU Europe) | 0.0172 |
| Zone 3 (NEU TP) | 0.1339 |
| Zone 4 (NEU Rest) | 1.7643 |
| Zone 5 (Satellite) | 4.40 |
Cosmote eSIM speeds for both local and roaming plans are detailed in the next section.
Cosmote eSIM Greece’s 5G coverage is widespread in Greece, as seen in the map of the country below.
On the other hand, Network speeds within Greece typically reach 30 Mbps or higher, as illustrated in the map below.
To see Cosmote eSIM speeds outside of Greece, you can refer to the 3G, 4G, and 5G coverage maps below.
Cosmote eSIM delivers fast, reliable connectivity in Greece and abroad, offering flexible plans with data, calls, and SMS. Its standout features include:
Cosmote Telekom holds an impressive 4.8 out of 5 rating on the App Store, backed by more than 408,000 reviews. The company also shows active engagement by responding to customer feedback daily, either offering solutions or asking for more details about reported issues.
When looking at customer feedback, one-star reviews often mention app glitches, unhelpful chatbots, or connectivity issues. On the other hand, five-star reviews highlight the app’s reliability, ease of use, responsive customer service, strong internet connection, and English language support.
While opinions are mixed, the overall high rating suggests that most users have a positive experience with the app and service.
Meanwhile, the prepaid service WHAT’S UP holds an even higher rating of 4.9 out of 5 on Google Play, supported by more than 362,000 reviews. Negative feedback often points to buggy updates, frequent crashes, and login errors, while positive reviews emphasize the app’s ease of use, attractive offers, and reliable connectivity.
That said, reviews from August 2025 appear more mixed, with 9 out of 15 ratings being one-star due to app issues, which may raise concerns for customers and is worth keeping an eye on.
In addition, unlike the customer support for Cosmote, WHAT’S UP’s customer support shows limited engagement, with only occasional and inconsistent replies to user feedback.
Cosmote provides 24/7 phone support and live chat via the app, with assistance available in multiple languages. You can also use their online contact form if that’s more convenient.
Both the website and app are available in Greek and English, and customer support responds to messages in both languages.
Cosmote is generally more responsive to its app reviews, whereas WHAT’S UP customer support tends to be inconsistent. While there isn’t a dedicated team specifically for Cosmote eSIM products, you can reach customer service at 13888 for assistance with purchasing or switching to a Cosmote eSIM.
Cosmote offers the MyCosmote app and the WHAT’S UP app. In both apps, you can manage your data usage, top up, pay bills, check your plan details, activate offers, and access customer support.
Both apps are user-friendly but cater to different audiences. MyCosmote is mainly aimed at adults and everyday users, while WHAT’S UP is designed with students and younger audiences in mind.
Cosmote eSIM is a convenient choice for both residents and visitors in Greece, but it lags behind top travel eSIM providers when it comes to flexibility, brand localization, user experience, and worldwide coverage. Below are some leading alternatives worth considering.
| Provider | Strengths | Best for | |
 | Holafly | Unlimited data plans, flexible usage period (1–90 days), starts at $3.90 per day | Those who use a lot of data, take extended trips, or want unlimited data without the hassle of tracking usage |
 | Vodafone Travel | Adjustable validity (7-30 days), fixed data plans (2-50 GB), trusted global brand | Travelers who want dependable coverage from a major carrier and have short to mid-length trips with moderate data usage |
 | Saily | Low-cost entry plan (1 GB for 7 days at $4.49), simple fixed data options | Travelers on a budget, taking short trips, and using minimal data |
 | Airalo | Wide range of data options (1 GB-20 GB), affordable entry point ($4.50), reliable coverage | Travelers looking for flexible, cost-effective data plans with worldwide coverage |
The short answer is yes. Since 2020, Cosmote Greece has been offering eSIMs to both prepaid and postpaid customers.
Based on our research and comparison of top eSIM providers for Greece, Holafly stands out as the best eSIM for tourists in Greece, as it has reliable unlimited data with helpful 24/7 live chat customer support and an adjustable usage period from 1 to 90 days.
Yes, you can use a physical SIM card and an eSIM on the same device as long as your smartphone supports dual SIM functionality.
Note, however, that to use their eSIM, Cosmote requires you to have a physical SIM card as well. As a result, it’s less convenient than some other options.
Yes. Certain devices allow users to store multiple eSIM profiles, including Cosmote eSIMs. However, only one eSIM can be active at one time. Generally speaking, it’s not worth it to have more than one Cosmote eSIM.
Yes, the Cosmote eSIM works in over 60 countries with the provider’s roaming services. Once activated, you can use your prepaid eSIM in any of the listed countries. However, be aware that roaming charges may apply unless you have a roaming-specific plan.
Yes. Alongside Cosmote, travelers and locals in Greece have several options. International eSIM providers such as Holafly cover Greece as well as many other countries, making them a flexible choice for frequent travelers.
For local alternatives, providers like Nova and Vodafone also offer competitive mobile and eSIM services.
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