At the moment I'm experiencing increased internet failures, which seems very unfavorable for Corona. Because I also have a bad internet connection via laptop in Caffes, I would like to know if you know how to receive Internet on the go (on the go or from all devices) if you don't have it at the current provider.
So I don't understand your question 100%.
Prepaid Sim - This allows you to top up your card and surf the internet with mobile data
Contract - here you are contractually bound to the provider whether it is only 1 month or 2 years
Here are a few providers: WinSim, Telekom, Vodafone, o2