@Kevin_Z thanks for your answer. The model of the router is : Model No. TL-WR902AC The hotel offers 2.4Ghz and 5Ghz at the same time but I'm not sur if a device can be connected to it on both...

Hi, I'have just settled down in a hotel with a public wifi connexion, this connexion is offered in 2.4Ghz or 5Ghz. I bought a tp-link AC750 to have my own private network for my devices and getting...