^
With Vodafone it still would require a half year uploading of the pre-paid.
And it seems to depend on what time and what location if you can upload only 10 euro. Most of the time it is a minimum of 20 euro.
Vodafone is the only one with an almost decent reach here though.
My garden however does happen to be in a very small area where the reach is less than should be, even for Vodafone.
Landline is still a necessity.