I would like SmartThings to add the ability to turn on/off either the ZWave or Zigbee radios. I understand that one of the advantages of SmartThings is that it supports both. However I don’t have any ZigBee devices and it is interfering with my 2.4gHz Wifi, so I would like to turn off the ZigBee functionality. This seems like a reasonably simple software update.
Seems to me you may need a better router. Usually your router would interfere with your Zigbee network, depending on what channels you are using, not the other way around.