Use APKPure App
Get Berlin old version APK for Android
Berlin transport maps, metro, subway, trams, U Bahn, S Bahn. 2017
Berlin public U-Bahn and S-Bahn metro map. Feb 2018
U Bahn and S Bahn
Offline, fast opening.
No online data usage.
I am an academic I do this for fun not commercial stuff.
Oreo version 8.1 API 27 prepared.