@amit.myid Hi, this is for the MR6400 V4:

@Armeanu Hi, thanks for getting back. We have reported the issue to the support engineers, they will likely reach out to you via email to continue to troubleshoot your issue.

@rscally Hello, sorry to hear that the issue persists on the replacement unit. May I know who is your ISP, and what is the current firmware version of your A7?

@amit.myid If yours is V4, please get the beta firmware from the below post: https://community.tp-link.com/en/home/forum/topic/241534

@Oakmario Generally, the AX6000 will determine which band is best for the device to use when Smart Connect is enabled, thus your Samsung Galaxy Tab S1 tablet may accept it and swift the connection....

@paparazz01 To locate this issue and try to fix it, we would like to follow up on your case via email. Please check your inbox and provide the information that we need.