You may access the router's configuration page and check if you have the WAN details on the "status" screen. If there is a WAN IP but you are not connected to internet, you may need to run some ping...

It seems that without that Android phone all the wireless devices are connected to wifi with no problem? What's model number of that Android phone? When the problem happens, you may turn the wifi off...

What do you mean by the "occasional poor wifi signal"? The wifi signal your laptop gets is very poor? You know several factors, like the distance, physical blocks and interference with other...

You must have downloaded the wrong thing. Actually, it is the "easy setup assistant utility" that should be downloaded. Yours is V4, so please download the utility from...

The internet provider-box must be a router, right? If yes, you can connect the TL-WR702N to the switch by cable to use it as a wireless access point. This TL-WR702N is working in access point mode by...

In client mode, DHCP is disabled on TL-WR702N. So the device connected to the client by cable obtains IP address from the 4G wifi router.