f3ar: OK this is just getting ridiculous. This is what the AVM serious recovery has to say:
Right, let's lay down the facts.
1. Firmware downgrade has been hard-disabled. It is impossible to downgrade the firmware.
2. Snap has hard coded the initial settings into the device. A GUI factory reset doesn't do jack.
3. They have also locked out factory recovery of the device.
I'm going to have to have a strong worded discussion to Snap about this, as I have a box with a sub-par firmware, that stuffs up and crashes when you configure port forwarding that doesn't work, and is locked down.
Not happy.
i would too. not being able to downgrade to the known best firmware for short VDSL lines is a little short-sighted.
seems odd that a factory reset doesn't fix you though..
digging into the German forums, this could be a bootloader image messing with you. unfortunate thing is, firstly, you telnet and the chops to risk bricking on a downgrade of the loader.
secondly, not 100% sure on the process..