@AndreaTogno Hi, please connect your cellphone to the extender's wifi first and verify whether the Tether app can find this device. You can try to reboot them or turn on/off the wifi function on the...

@Shir Hi Shir, what is the model number of your product? The default extender's wifi is open, no password needed. Once you configured it, the password will be the same as the main router. Or you can...

@Ghaffar To configure TL-WR940N as a repeater, you can refer to https://www.tp-link.com/support/faq/1383/

@Jalmar25 What is the current problem? How can we help you?

@tomme52 Theoretically, you can connect the two RE450 in series. But it is not suggested to connect them like daisy-chained cause the performance of the further unit will be affected a lot. You can...

@Jojogobi Hello, yes, you need a router that supports the Onemesh feature as well. FYI, at least a router and a network expansion device （like range extender）are needed to build up a mesh network....