Any other wireless clients except the phone and laptop are connecting to W9980 wirelessly as well? It might be your phone's problem if other wireless clients are working well. What's the link speed...

What's the firmware version of your D7? Is it up to date? Only Andoid wireless clients and wired PCs are working properly all the time, right? There are some aceess points connected to LAN port of...

No need to open ports. Try guides here. If you still cannot make it, describe the problem in details. http://www.tp-link.com/en/faq-879.html http://www.tp-link.com/en/faq-821.html

It should be flashed in factory defaults. It is not available to us.

No such a table as all TP-LINK powerline adapters can work with each other. No compatibility issues...no worries...

When the unit is placed in the garage, powerline light goes off automatically? If so, it is a electrical wiring issue and powerline adapters cannot work then.