On the roof of the student residence at Halbauer Weg 19/21, between all the Telekom-owned sites, there are some o2 LTE antennas.
the student residence seen from west (Brieger Str.)
seen from north (Kamenzer Damm): Telekom owns everything on this roof, except two o2 antennas, that could be second from right
seen from east (in front of the Kummer Erd- und Tiefbau GmbH property) (Haynauer Str.)