If I umhöre me so, hardly anyone knows that there is a box in which simply an ordinary mobile phone SIM card is inserted, and you then this box any conventional phone (also DECT phones) can connect. Ideal for people, but the phone only via mobile phone in some apartment areas have poor reception: Just up the box where the reception is good (an extra antenna for poor reception, is attached). Then a regular phone or a cordless DECT telephone plug - and kanns go. That is at the Box "Vodafone", has technically nothing to say. The Box works with all SIM cards.