This is one of 2 nearby Vodafone 4CA-enabled sites in Berlin-Lichterfelde, at Moltkestraße 1 right next to S-Bahn station Botanischer Garten. The B3-LTE-signal really reaches far east, since Vodafones B3-spectrum is pretty empty in the south of Berlin due to rare deployment at the sites.
Seen from the backyard south-west:
Closer view:
Seen from the crossing south-east: