@Sunshine ok so we had disabled 5Ghz an were receiving that issue - e.g. on iPhone or Android it would show "Wifi at max capacity" or similar. When enabling dual 2.4/5Ghz the problem went away, we...

We recently purchased a TP-Link Archer MR600 as a 3G/4G Modem & Router. According to its product description and package, it should allow up-to 64 simulataneous devices connected at the same time....