I mean internet reception for a laptop.
I only know of mobile offers. However, some of them are also limited to mobile devices.
If O2 works for you, then maybe this:
https://www.freenet-funk.de/
Via sim card flat rates jupps, I have freenet radio can even be canceled daily, but payment is via PayPal instead of credit. But you have unlimited data volume for 99 cents per day.
Take a look at Congstar. There's internet via cellular network (can be canceled monthly by option), everything is in the Telekom network.
Why should o2 not work? Today's smartphones don't have any more simlocks… At least hardly any more. And freenet funk is also ne simkarteflat, but also alditalk or netto and all the sim flats, go.
O2 still has gaps on the map. At home you can only make calls with CO2, the LTE reception is almost zero. 12 km further you can't even make phone calls.
Well then use the d2 network… They are almost everywhere, or any telecom networks.
I do. I just wanted to recommend checking beforehand whether the desired provider is also available at the location.
Do you mean for home (DSL) or mobile (LTE)?
Both are available at Congstar, for example.
Congstar also has DSL tariffs with a 1 month term (and probably also from other providers)