Download speeds are too slow. Why?

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3

I called 1&1 yesterday and asked why I only have 5 - 6 download speed. The supporter then said that It can't be you should have a download speed of 50 per second (I have a DSL-50 with 1&1) he said it must with my end Device be something then we ended the conversation and I checked my laptop and also had only 5 - 6 download speed (via WLAN as well as via LAN cable) I checked the Fritzbox page and found it on my PC and I thank you me in advance for the answers

Pu

5 - 6 Mbits

Mbits or Mbytes?

And what is decisive is what arrives at your router.

Is

50MBit is 6.5MByte.

There are two different pieces of information. And if you have 6Mbyte, that also works with a 50MBit line

Ce

6.25MByte / s *