For a three weeks project in Oporto, Portugal, I will need a prepaid mobile internet solution.

Which Portuguese company offers a UMTS prepaid scheme? 'Simple' UMTS/3G (384/64 kbps) is fully sufficient.

Since summer 2007 there is Yoigo of Spain (prepaid & postpaid) charging a monthly minimum of € 7 for unlimited quantity of data, even VoIP is possible. The per-day-charge is a flat € 1.40 which gives you three weeks for just € 30.

Is there a similar price plan available in Portugal? Since their change in tarification & pricing, roaming with an Italian Wind SIM is no longer an option.

Thanks for your help!