Very Slow Upload Speed [EN]

[01mb]

We have currently very slow upload speed (which is around like 0.5 to 2.5 mbit/s) and our tariff is 1000mbit/s download and 50mbit/s upload. I saw in some other forums and in the Speedtest Plus of Vodafone that it is kind of an issue about the "Return Path Interference". Does anybody knows how to fix it? Thank you so much. You can see the test results in the attachments. 

[Kurtler]

If it is a return path interference, there is nothing you can do yourself.

Best regards Kurt