[Biketour] anonymous sim-cards

Helllo everyone! I am need of an anonymous simcard. It is important that it can be recharged without being in the country where it was bought. (but it would be possible to buy recharges in andvance and activate them from abroad)

Maybe you have any advice in which country this is possible? So far I know that in france lycamobil is good, just that you have to make a phonecall for each one and it is not always working, in czech republlic there is the ones from tesco but recharge is trouble.

sorry for the off-topic but it is for an important issue ;)

good bike, L