Privacy Policy

This Privacy Policy explains what personal data Zentel collects when you use our applications and websites, why we collect it, who we share it with, and the choices you have. It applies to the Zentel apps for iOS, Android, Windows and web.

• Account data — phone number or email, display name, profile photo, and language preference.
• Service metadata — who you called or messaged, call duration, timestamps, and delivery status. This is required to route traffic and bill correctly.
• Virtual number data — numbers allocated to you and, where a regulator requires it, identity or address documents.
• Payment data — credit purchases and balance. Card details are handled by our payment providers and app stores; Zentel does not store full card numbers.
• Device and diagnostic data — device model, operating system, app version, crash reports, and approximate region derived from IP address.
• Support data — messages you send to our support team.

Contacts are matched on your device where possible. If server-side matching is needed, contact identifiers are transmitted in hashed form and are not used for any other purpose.

One-to-one and group messages and app-to-app calls are protected in transit with end-to-end encryption. Zentel cannot read the content of those communications. Undelivered messages are held encrypted only until delivery, and are then removed from our servers. Calls that terminate on the public telephone network cannot be end-to-end encrypted, because the carrier leg is outside our control.

• Operate, route and deliver messaging, calling and number services.
• Authenticate you and protect accounts against fraud and abuse.
• Process credit purchases and maintain accurate balances.
• Diagnose faults, measure reliability and improve quality.
• Send service communications such as security alerts and billing notices.
• Meet legal, regulatory and telecommunications obligations.

Where the GDPR or a similar regime applies, we rely on: performance of our contract with you (providing the Services); legitimate interests (security, abuse prevention, service improvement); legal obligation (telecoms and financial record keeping); and consent, where we ask for it — for example optional analytics or marketing. You can withdraw consent at any time.

We share personal data only as described here:

• Telecommunications partners — carriers and numbering providers that terminate calls and messages and allocate virtual numbers.
• Infrastructure and service providers — hosting, storage, push notification delivery, crash reporting and customer support tooling, under contract and limited to our instructions.
• Payment providers and app stores — to take payment and prevent payment fraud.
• Authorities — when we are legally required to respond to a valid, lawful request, and only to the extent required.

We do not sell personal data and we do not share it with data brokers.

Zentel operates globally, so your data may be processed in countries other than your own. Where data leaves a region that restricts transfers, we use recognised safeguards such as Standard Contractual Clauses together with technical measures including encryption in transit and at rest.

• Account data — kept while your account is active.
• Call and message metadata — retained for the period required by telecommunications and tax rules in the relevant country, then deleted or aggregated.
• Undelivered message content — removed once delivered.
• Diagnostic data — typically retained for up to 12 months in identifiable form.
• After account deletion, remaining personal data is removed within 90 days unless the law requires us to keep it longer.

Depending on where you live, you may have the right to access, correct, delete, export or restrict the processing of your personal data, to object to processing based on legitimate interests, and to lodge a complaint with your data protection authority.

Many of these actions are available directly in Settings → Privacy in the app. You can also contact [email protected]. We respond within the period required by applicable law and never charge for a first request.

We apply end-to-end encryption for in-app communications, TLS for data in transit, encryption at rest, least-privilege access controls, audit logging and regular security review. No system is perfectly secure, so please use a device passcode and keep the app updated.

Zentel is not directed to children under 16, or under the minimum age set by local law where that age is higher. We do not knowingly collect data from children below that age. If you believe a child has created an account, contact [email protected] and we will remove it.

Our website uses strictly necessary cookies to function. Optional analytics cookies are set only with your consent, and you can change that choice at any time. The mobile apps use privacy-preserving diagnostics rather than advertising identifiers.

We will post any update on this page and revise the date above. If a change materially affects how we use your data, we will notify you in the app or by email before it takes effect.

Privacy enquiries and data subject requests: [email protected]. General support: [email protected].