not compatible: AC86U & T3200M?

[wireless]

I just bought the Asus AC86U yesterday and planning to return it to best buy and get the 68U instead due to some issues . B4 i had my asus N66U connected as wan to t1200h wan with no issues whatsoever and getting around 30mbps on my 25mbps plan through wifi. Also i hooked up my optiktv boxes to my router by enabling IGMP to reduce the workload of the t1200h. however on my t3200m which i connect as Wan to Wan on my AC86U when i tried to hookup my tv boxes on the router the tv signal will cut off immediately for ex: tv shows pictures then it will immediately goes black and doesnt say tv lost signal just black screen & the wifi only delivers 18mbps instead of 25mbps But now i upgraded to a 75mbps plan and spoke to a technician he is coming over tomorrow to add a new dsl line cuz he mention it requires 2 dsl lines for 75mbps and he also said that he don't recommend t3200m hooked up to any router cuz of stability issues & its better off alone so instead he will replace my t1200h w/ a t2200h. But i didn't mention that my t3200m is preowned my cousin just gave it to me. The only downside that my cousin told me was the wifi of t3200m.as of now Im using my N66U & T3200M


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