Does it help your bandwith if you unplug your modem from time to time?

In general, unplugging your modem will not have any impact on your network bandwidth. However, there are occasions when restarting your modem will increase the amount of network bandwidth available to the computers on the network.

It is possible for the internal software (or firmware) of the modem to enter an inconsistent state, resulting in less effective bandwidth caused by corrupt or lost network data. In most cases, unplugging the device causes it to restart and full bandwidth is restored.