I could install OpenWrt successfully on the FRITZ!Box WLAN 3370 for Micron from Debian.
OpenWrt works so far good but DSL has no sync and in the options for DSL no VDSL2 G.Vector (ITU G.993.5) is available and I don't know where I can find a driver that I can use for VDSL2 with Vectoring (Deutsche Telekom).
DSL comes with 100/40 MBit/s (seen on original web interface)
OpenWrt cannot ship vectoring capable modem firmware blobs due to licensing reasons, but you can supply your own (e.g. extracted from AVM's firmware images) and make it work that way.
I've got the *.image file like *.so (ld-uClibc-0.9.33.2.so or libuClibc-0.9.33.2.so) from \var\tmp\filesystem\lib or from the device via FTP at booting?