4. PERMITTED USE <p>4.1&nbsp;The User may use the Service in accordance with the usage provisions (Section 5) either for operational use (Section 2) or for test purposes (Section 4.3) (jointly, "<strong>Permitted Use</strong>").</p> <p>4.2&nbsp;If the User uses the Service in order to use a THREEMA-Client for its intended use ("<strong>Operational Use</strong>"), the Service must be used via a THREEMA-Client that has been obtained via a distribution channel offered or approved by THREEMA (e.g. Google Play, Apple App Store or Threema Shop) or that has been explicitly released by THREEMA for use.