  Applications of the quantum switch on quantum channels have recently become a
topic of intense discussion. In the present work, we show that some useless
(for communication) channels may provide useful communication under the action
of quantum switch for several information-theoretic tasks: quantum random
access codes, quantum steering, etc. We demonstrate that the quantum switch can
also be useful in preventing the loss of coherence in a system when only
coherence-breaking channels are the available channels for communication. We
also show that if a useless quantum channel does not provide useful
communication even after using a quantum switch, concatenating the channel with
another suitable quantum channel, and subsequently using the switch, one may
achieve useful communication. Finally, we discuss how the introduction of noise
in the quantum switch can reduce the advantage that the switch provides.
