DNS.NET and Versatel (now 1&1) have their own fibre network in some areas of Berlin and they actually do FTTH if you are one of the lucky few. I live in a pretty dense and central area of Berlin and all i get is 50Mbps VDSL, because i want to avoid the cable providers that have an inferior network. For private usage it's still okay and i have access to 1Gbps at work, but i still can't wait for Vectoring to arrive.
"I want to avoid the cable providers that have an inferior network"
I live in Köln, and because of the distance to the nearest loop, I don't get the 100mbit offer from Telekom… only 18mbit vdsl at best. I went to UnityMedia cable and get 200mbit. Unity is an Evil Media Company, but I haven't noticed anything wrong with their network. So what am I missing?
In general using Cable, more people have to share the same bandwidth, especially if the provider cheaped out and only does whats necessary. You don't even get your own IPv4, you are basically sharing public IPs with other people through NAT, which makes accessing anything at your home more complicated as well.
This is one domain where Berlin is clearly lagging behind compared to most European cities. The LTE coverage is another one too. I personally don't care much, but the reliability of Telekom's network in Berlin is a total joke (Vodafone seems a bit better, O2/E-plus suck but it's cheap at least).
I have no problem with Telekom LTE though, seems to generally work fine and gives me >50Mbps in most areas, it's often faster than my 50Mbps at home.