The 99.99% is right as far as paying for 3 months is concerned Hannah, but the charge is 16,15 € / month.
The new rate of 17,01 € starts in 2005, assuming it's confirmed on the 8th of October by the Ministerpräsident conference (which it will be).
The plan to extend it to computers is planned for the beginning of 2007.
BUT before you all have a fit, the computer will also count as a second device - i.e. if you already have a TV and are paying the licence, nothing changes. Mainly businesses which at present have no TV will be affected.
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it is near impossible, there are too many different ways of connecting to the internet.
No problem you require the service providers to notify the GEZ and you've got about 90% - 95% of users covered. Sure you could always use call-by-call, but it's not exactly comfortable and I think most people nowadays use a fixed provider.
You can find more details on t-online -
www.t-online.de