@sebastiantruji 

Is your main deco in access point mode of router mode?

@mastermjr2004 the main deco acces point is connected to the router. 
and when I connect to the router the speed is 150 and in that same point connected to the deco is 25. Something must be wrong with it. And it is brand new should I ask for warranty ? is it a product defect ? Or there is something else i can do ?

thanks 

@sebastiantruji 

Have your turned off the wireless on the router itself?

@mastermjr2004 can I ask you what do you mean with this? Turning of the wireless of the original router ? I don't understand. Thanks 

@sebastiantruji 

Yes on the main router you need to turn off the wifi feature if you have not done so already.

@mastermjr2004 Unfortunately the main router dont have the option to torn off the wifi. I tryed with the other deco(as they come two) and still the same issue. close to the router the speed is 1/3 of the speed with the original router in wifil. dont know what else to do

@sebastiantruji 

Who is your isp and what router/modem do you have?

@mastermjr2004 my internet service provider is claro Colombia. But the internet of clwro is working fine because the Speed from WiFi and cable is 150. The problem is when I connect to the deco It immediately reduce to 50 max 60. Even when I try to connect tre computer to the deco via Ethernet cable