I live in Berlin and have LTE 95% (5% 3g). Tell me, where exactly do you live? I call your post a lie.
that was near Potsdamer Platz on the U-Bahn and i have Telekom. To be honest I just moved here but back in Stuttgart its also horrible. 60% of the commute between the city center to my work place on the sbahn had no phone service. For example it shows 3G but nothing is loading. It was better the last few weeks cuz not as many people where around. The ICE ride from Stuttgart up to Berlin also had a lot of black holes. Same in Frankfurt, 5 minutes out of the city and boom edge