We cordially invite you to join 6G-SANDBOX at EuCNC2023 6GSummit2023 for a co-located event (https://www.eucnc.eu/programme/co-located-events/co-located-event-2/), where the 6G-SANDBOX team will present and answer questions about the Open Call for third party experimenters, which was announced on the 24th of April. The presentation will cover an introduction to the 6G-SANDBOX platform, the submission process, the evaluation and how engagement will be done when selected. Technical topics as outlined in the call will also be presented. There will be room for Q&A. Participation to the session is free but registration is required (https://6g-sandbox.eu/oc-1-registration/). The meeting will be hold in a hybrid format for people who are not attending EuCNC 2023. The meeting will be recorded and made available to the registered participants afterwards.