Hi, How do I see the tplink app version ? What is the main wifi repeater among the 3 I've got ? My app is not sending any code to my email so it doesnt continue and so I cant comunicate with the deco...

Hi , I've purchased TpLink Deco M4R -mesh wifi hotspot- 3 units. I've downloaded the Deco app from google play. I've followed the instructions but only one unit works, other units blink -RED. The...