Contract Transfer from Sim to Dsl or Fibre

Hello, I am planning to order a SIM-only home internet contract (around 50 Mbps for €14/month). Before ordering, I would like to clarify a few points: If DSL or fiber becomes available at my address later, will I be able to cancel the SIM contract before the 24-month minimum term? If yes, what would be the cost? Is there any option to switch (transfer) from the SIM contract to a DSL or fiber contract? If yes, are there any fees for this change? At the moment, I have checked and DSL/fiber is not available at my address that is in Dresden.  

Edit o2_Kathi 22.04.26 Moved from the section o2 Mobilfunk to English o2 Community