With a valid festival ticket, you're granted admission to the festival, yet admission to all clubs at any time can't be guaranteed. Due to capacity restrictions, waiting times can occur at several clubs. First come, first serve.
Wristband exchange at ARENA Berlin. Tickets can't be exchanged for festival wristbands at the participating clubs! Check the following link for opening hours.
Tickets are also available via eventim.de and regular ticket shops.