Book a tour Home Page Book a tour Want to join O4, but you're unsure if you'll like it? Come for a tour, where we'll show you the most important facilities and answer all your questions! Our team will show you everything. The tour takes about 30 minutes. Contact us to schedule a meeting! Or call us: 795 600 982 The O4 team is available during from Monday till Friday between 8.00 AM and 4.00 PM. 71324