The unit keeps dropping wifi. updated software, tried both bands, still nothing. the worst part this is a replacement unit for one that a now a paper weight.
Did you set wifi on router to best setting? The wifi settings on router are the most important part. Try using different setting, channel etc. For example when setting ac on my router most of them work at 300 mbps but I found setting where mbps go to roof! Also antenna position on device should be at 90° angle one to other. Maybe this will help.