@DhanrajKumar 

Hello,

Can you please confirm what if you never connect this Samsung galaxy s6 lite tab to the C6 network? Will the router still reboot?

Is the Samsung galaxy s6 lite tab connecting to the C6 5GHz network? Try to change the 5GHz wireless channel to different ones, such as 36/40/44, and channel width to 40MHz, then monitor again.

Meanwhile, how about the TxBF and MU-MIMO on the Advanced->Wireless settings page, ensure it is disabled.

Good days.

@DhanrajKumar 

Hello,

Please confirm what do you mean by rebooting, are all the LEDs turn off then on automatically and the internet on it will temporarily down then recover? 

May I have your network layout, how is the C6 connected in your network?

Who is your ISP and what kind of modem are you using? Is it a Dynamic IP setup on the C6 WAN or PPPoE?

How many devices are connected to C6, wired, and wirelessly? 

Is there any other setting or feature in your network that may cause this restart issue, or is there any special operation/activity in your network that causes the C6 to restart? What if you disable the Smart Connect feature on it?

Is it the original power adapter on the C6? Is the power stable in your house? How about other electrical devices in your house, are they stable?

Does this issue happen when you purchased it or happens recently? Is the C6 an EU version or a US version? Please check this on its bottom label, thanks.

@DhanrajKumar 

Hi, thanks a lot for all the details you've provided, I have sent you a message personally, please confirm it.