Privacy policy / dated 29.06.2023





For the purposes of this Privacy Policy:


  • Application refers to the OpusTel application for iOS, the OpusTel application for Android, published by Emil Urs Loeliger, Telephoenix AG (Switzerland);
  • Company (referred to as either "the Company", “Our”, “Us” or "We" in this privacy policy) refers to Telephoenix AG, whose head office is at Gumprechtstrasse 33, CH 6373 Emmetten (Switzerland).
  • Service means - Secure VoIP service for calls via HTTPS, SIPS, SRTP, TLS provided via the Application.
  • Personal Data is any information that specifically identifies an individual (such as your name, user name, address or e-mail address), processed by the Company for the purposes set forth in this privacy policy. Personal Data also includes any information about an individual that is directly linked to personally identifiable information and is processed by the Company for the purposes set forth in this privacy policy. Personal information does not include “aggregate” information, which is data the Company collects about the use of the Service (such as automated crash reports) or about a group or category of users, from which individual identities or other personal information has been removed. This privacy policy in no way restricts or limits our collection and use of aggregate information.
  • Company (referred to as either "the Company", “Our”, “Us” or "We" in this privacy policy) refers to Telephoenix AG, whose head office is at Gumprechtstrasse 33, CH-6373 Emmetten (Switzerland). 
  • Device means any device that can access the Service such as a cell phone, tablet or a computer.
  • User means a natural person using the Application for personal or professional purposes.


Privacy information access preface

The company attaches great importance to protecting the privacy of the users of our products. With this in mind, no user information is collected unless it is required to use a specific feature of our products (Apple Push Notification Service, Firebase Cloud Messaging) and is never shared with third parties. The only case where information is requested that is not listed here is for use in troubleshooting technical issues, and of course the user has the option to opt out in that case. The OpusTel app also authenticates our server with the 256 bit certificate from SwissSign and the conversations between the OpusTel app and the server are encrypted. This can be checked on the golden lock on the screen! This protects you for example from targeted espionage in terms of IMSI Catcher or other "man in the middle" attacks even if only you use the OpusTel app. For example also from router spying on the internet. For an "end to end" encryption that protects against mass surveillance, both parties need the OpusTel app!

This privacy policy contains the full list of features built into the Application that in any way process users’ private information. Whether a feature is enabled or not, and thus whether the private information required for the feature to work is accessed, depends solely on the SIPS account configuration in the Application.


Push Notifications

In order for Push Notifications to work, we must register your account remotely when the Application is in the background or closed on your iOS or Android device. To accomplish this, we transmit your SIPS account details to SIPIS (our server that handles push notifications) over a HTTPS – secure connection. This information is shared with no one and is erased immediately when the push instance expires (usually within 3-6 days, depending on SIPS account configuration) or the user disables Push Notifications in the Application. If the SIP account is configured to use one of our methods for multitasking instead of Push Notifications, this information is not sent to SIPIS.


Mobile App Location Information Usage

This part of the privacy statement describes how the Company uses the location information you provide by granting the Location access permission in the Application.


We ask the location access permission only if the SIPS account is configured to do so, and only in the following use cases:

  • When the SIPS account is used in a country with Dispatchable Location for emergency calls legal requirement.
    In this situation, the app attempts to acquire your location information in case a call to an emergency number is placed. Please note that emergency calls are usually routed to your phone's native dialer instead of requesting location access. Please consult with support to learn how emergency calls are handled for your account.
  • when the SIPS account is configured to send location data during SIPS registration 


We will only use your Location information for the specific reason for which it was provided to us.


Mobile App Analytics Usage

The Company may collect aggregate data that no longer identifies individual users for purposes of usage and performance analysis. This may include diagnostic data such as login counts, screen view counts or crash information.

Troubleshooting Logs Usage

For the sole purpose of troubleshooting, the Company might ask users to provide debug logs from the Application. The debug logs contain full network traffic information for application provisioning, calls, messaging and other network in-app events generated by user activity.

Retention of Information

We maintain your personal information in our regular business records while you are a customer of your Service. If You are no longer a customer we will delete Your data after 6 months.


The security of personal information is important to us. We take commercially reasonable measures and follow generally accepted standards to protect the information you provide us, both during transmission and once we receive it. For example, the information you provide is transmitted via encryption using technologies such as (SSL, TLS, SRTP and SIPS).

Disclosure to Third Parties

We do not share or sell your personal information to third parties.

We disclose information only in the following cases: as required by law, such as to comply with a subpoena or similar legal process when we believe in good faith that disclosure is necessary to protect our rights, protect your safety or the safety of others, to investigate fraud, or to respond to a government request if we are involved in a merger, acquisition, or sale of all or a portion of its assets, you will be notified via email and/or a prominent notice through our app of any change in ownership or uses of your personal information, as well as any choices you may have regarding your personal information to any other third party with your prior consent to do so.

Privacy Statement Updates

We may update this privacy statement to reflect changes to our business or this app as it pertains to the information collected from you and our use of it. If the change impacts how we use or handle information collected from you, we will email you and/or your company’s Google administrator, or post a notice where you first access this app prior to the change becoming effective. We encourage you to periodically review this page for the latest information on our privacy practices.


As a user, you can request the following:

  • Confirmation of access to personal data concerning you 
  • Access to the processed personal data concerning you. 
    • Please note that pieces of personal data stored in encrypted format can only be provided in its encrypted form.
    • Please note that once data is removed it cannot be restored.
  • Correct inaccurate or incomplete personal data concerning you 
  • Erase processed personal data concerning you 
  • Arrange how personal data concerning you should be processed in event of your death


To process a request, please send us an email to with the following:

  • Subject of request, your name(s) and first name(s);
  • Your customer number
  • Your phone number used with the OpusTel App.
  • Scan of both sides of your passport or identity card to enable us to verify your identity


Company support will respond to requests in a timely manner (within 10 days of request).
Company support might ask you for further information, such as a username or a phone number, in order to determine what information has been collected about you.


OpusTel uses digital 256 bit certificates (CA) * from SwissSign for the App, the server and the WEB-side.

This 256-bit digital certificate adds an extra layer of security to the OpusTel application! In addition to the encryption of the call content.


If you have any questions or concerns about our privacy policy, please contact us at E-Mail: or via our WEB-side: .