In Germany you can pay 35€/mo for 5GB of data traffic (t-mobile) and then enjoy the bandwidth of 5G for a full 40 seconds. It's a total joke.
> The prevalent means of connecting to the Internet in Germany is DSL, introduced by Deutsche Telekom in 1999. Other technologies such as Cable, FTTH and FTTB (fiber), Satellite, UMTS/HSDPA (mobile) and LTE are available as alternatives.
So I always recommend to do the Excel sheet and include all costs for the 2 year contract.