The AVM FRITZ! Fon C4 phone's been receiving critical house areas my feeling a lot more stable than the previously used AVM FRITZ! Fon MT-F. The menu between C4 and MT-F is actually almost identical. About the design in white or black, the taste has to decide. Who does not have thick concrete walls or other receiving disturbing Baumateriealien in the house, or just for homes is expected, with the MT-F no problems haben.Hier can also serve as the favorable price purchase decision. I do not regret buying the C4 in my home receiving critical date.