From an echo effect for calls neither I could find my interlocutor something!
However, I must say that I am not completely satisfied with the processing. In some places, where something was punched or merged one notices significant edge. For this price, but of course you can not expect a high-end envelope. Nevertheless, I feel personally said edges as disturbing, so I will have to deduct 2 stars here because of the haptics.
All in all, I can, however, recommend the sleeve for this price!