We have a Fritz! Fon MT-F and we already resigned for many years almost so that you may not be in a noisy environment in speakerphone mode, or have to listen very well. Since the adjustable volume still further would two stages, but distort the speaker or the amplifier of the MT-F so that so that no more profits can be achieved. When C4 housing thicker and probably the extra space is well suited to install a more powerful speaker. Anyway, you can thus use all volume levels makes sense. Also the phone is better in the hand than the thin and wider MT-F.
