Terms & Conditions

Last updated: 14 July 2026

These Terms & Conditions (the “Terms”) constitute a legally binding agreement between you (“Customer”, “you”) and ZEUST LIMITED, a company registered in Cyprus (HE 362856) trading as DataSIM (“DataSIM”, “we”, “us”), and govern your use of our mobile application, website (data-sim.app), and eSIM services (collectively, the “Services”).

By purchasing, installing, or using a DataSIM eSIM, or by creating an account, you accept these Terms in full. If you do not agree, please do not use the Services.

1. Definitions

eSIM — a digital SIM profile delivered electronically that enables mobile data connectivity on a compatible device.
Installation — the moment an eSIM profile is downloaded onto a device (by scanning the QR code, tapping the installation link, or manual entry). Each eSIM profile is single-use: once downloaded to a device, it cannot be downloaded again.
Activation — the moment the eSIM first registers on a mobile network or first consumes data, or the start of the plan’s validity period as described on the plan page, whichever occurs first.
Plan — the data package (data allowance, validity period, and coverage area) purchased with an eSIM.
Activation Window — the period of 180 days from the date of purchase within which the eSIM must be Activated. The Plan’s validity period (e.g., 30 days) begins upon Activation.

2. Service Description

DataSIM provides prepaid travel eSIM data plans covering 90+ destinations. Our Services include eSIM delivery and management, mobile data plans for international travel, and iOS/Android applications.

Unless expressly stated otherwise on the plan page, all plans are data-only and do not include voice calls, SMS, or a phone number.

3. Coverage & Where Your eSIM Works

Each plan works only in the country or region stated on its plan page. A single-country plan (for example, a “United Kingdom eSIM”) provides connectivity only within that country and will not provide service anywhere else. The eSIM connects automatically when you are physically located within the plan’s coverage area.

You are responsible for selecting the correct plan for your destination before purchase. Purchasing a plan for a country you are not in, or not travelling to, does not constitute a service fault and is not grounds for a refund.

Network coverage, speeds, and availability depend on local carrier infrastructure and may vary by location, device, and network conditions. Fair usage policies may apply where indicated.

4. Device Compatibility

Our Services require an eSIM-compatible, carrier-unlocked device for which you are the responsible user. It is your responsibility to verify compatibility before purchase using the compatibility information we provide. Purchases made for incompatible or carrier-locked devices are not eligible for a refund.

5. Accounts

You agree to provide accurate, current, and complete information, keep your credentials secure, and accept responsibility for all activity under your account. Your account is personal to you and may not be transferred. We may suspend or terminate accounts, at our sole discretion, for security concerns, fraud, or breach of these Terms; in such cases no refund is due.

6. Prices & Payment

Prices are displayed in USD and include applicable taxes unless stated otherwise. Payment is required in full before eSIM delivery. We accept major cards and the digital payment methods shown at checkout. All purchases are processed by ZEUST LIMITED.

7. eSIM Delivery & Installation

After payment, your eSIM is delivered electronically (in-app, by email, and/or via QR code / installation link). You must have a Wi-Fi or other internet connection to install it.

Important: each eSIM profile can be downloaded to a device only once. If you delete the eSIM from your device after installation, the profile cannot be recovered or re-downloaded, and any remaining data allowance is forfeited. Do not delete your eSIM until your plan has ended.

Activation Window: your eSIM must be Activated within 180 days of purchase. eSIMs not Activated within this period expire automatically, the purchase is forfeited, and no refund or replacement is due. Your Plan’s validity period (e.g., 30 days) starts only upon Activation, so you can safely buy in advance of your trip within this window.

8. Right of Withdrawal (EU Consumers)

If you purchase as a consumer, you have a legal right to withdraw from your purchase within 14 days without giving a reason. However, because eSIM plans are digital services whose performance begins at delivery:

Your right of withdrawal expires on the earlier of (a) 14 days after purchase, or (b) the moment your eSIM is Installed or Activated.

By purchasing, you expressly consent to the delivery of the eSIM beginning immediately and acknowledge that you lose your right of withdrawal once Installation or Activation occurs.

To exercise a valid withdrawal (unused, uninstalled eSIM within 14 days), contact support@data-sim.app from the email address used at purchase.

9. Refund Policy

9.1 Applicability

Refunds are available only for purchases made directly from DataSIM (via our website or apps). If you purchased through a third party, contact that third party.

9.2 Refunds before Installation/Activation

An eSIM that has not been Installed or Activated may be refunded in full within 14 days of purchase (see Section 8).

9.3 Refunds after Activation

Once an eSIM has been Installed or Activated, a refund or replacement is available only where you are unable to use the Services due to an error or omission on the part of DataSIM (for example, a confirmed technical fault of the eSIM or plan, or withdrawal of the Service by us), and subject to all of the following conditions:

You submit your refund request to support@data-sim.app within 30 days of the issue first arising;
You cooperate with our troubleshooting efforts, including providing requested information such as screenshots of your device settings, your location, and error messages;
DataSIM has been unable to restore your ability to use the Services within 10 days of receiving your request.

Where these conditions are met, we will, at your option, provide a replacement eSIM/plan or a refund. Where part of your data allowance has been consumed, the refund will equal the unused portion only.

9.4 No refund

Without limitation, refunds and replacements are not available where:

The eSIM has been Installed or Activated and is functioning as described (including where data usage is recorded on the plan’s network);
You are outside the plan’s coverage area (e.g., a UK plan used, or attempted to be used, outside the UK);
Your device is eSIM-incompatible, carrier-locked, or misconfigured;
You deleted the eSIM profile from your device;
Your travel plans changed or you no longer need the plan;
You failed to read the plan description, coverage area, or validity period;
Your account breached these Terms or our acceptable-use rules;
The eSIM was not Activated within its 180-day Activation Window and has expired;
The claim is made more than 30 days after the issue arose.

9.5 Refund method

Approved refunds are issued, at your choice, as (a) DataSIM credit, applied instantly and usable for future purchases, or (b) a refund to your original payment method, which may take up to 30 business days to reach you depending on your bank.

9.6 Unauthorized purchases & incorrect charges

If you suspect an unauthorized purchase on your account, or believe you were charged incorrectly, notify support@data-sim.app within 30 days of the charge with supporting details. We will investigate; whether a refund is payable in these cases is at DataSIM’s sole discretion. We reserve the right to suspend any account associated with fraudulent activity.

9.7 Chargebacks

Initiating a payment dispute for a purchase that has been delivered, Installed, or Activated in accordance with these Terms may result in suspension of your account and remaining services. We retain and, where lawful, submit technical records (including installation, activation, network-registration, and data-usage logs, and purchase metadata) as evidence in dispute proceedings.

10. Prohibited Uses

You agree not to use the Services for:

Illegal activity or violation of applicable laws;
Spamming, phishing, fraud, or other malicious activity;
Reselling, redistributing, or commercially exploiting our eSIMs or plans without our written authorization;
Purchases made using anonymization tools, proxies, false location or identity information, or stolen payment instruments;
Interfering with network security or integrity.

Breach of this Section voids any refund eligibility and may result in immediate suspension or termination without refund.

11. Limitation of Liability

To the maximum extent permitted by law, DataSIM shall not be liable for indirect, incidental, special, consequential, or punitive damages, including loss of profits, data, use, or goodwill. Our total aggregate liability for any claim relating to the Services shall not exceed the amount you paid for the plan giving rise to the claim. Nothing in these Terms excludes liability that cannot be excluded under applicable consumer law.

12. Changes to These Terms

We may update these Terms from time to time. The version published on our website at the time of your purchase applies to that purchase. Continued use of the Services after changes constitutes acceptance.

13. Governing Law & Jurisdiction

These Terms are governed by the laws of the Republic of Cyprus. Disputes are subject to the exclusive jurisdiction of the courts of Cyprus, without prejudice to mandatory consumer protections available to you in your country of residence.

14. Contact

ZEUST LIMITED (trading as DataSIM)
Registered in Cyprus, company no. HE 362856
Address: 1 Avlonos Street, Maria House, 1075 Nicosia, Cyprus.
Contact: support@data-sim.app