@Rawand Hello, please help verify some details and we will try to fix it together: 1. Ensure the C50 firmware is up-to-date. If not, update it first and reconfigure it from scratch. Below is the...

@Nica216 Hello, The default login username and password are both admin/admin, while if you have changed to your own credentials and don't remember it, you will need to reset the router to factory...

@Lucia242 Hello, sorry to hear that. May I know the model number of the TP-Link router? It is no longer powered on? Do you still use the original power adapter? Was there any power cut or bad weather...

@ksk235 Hello, It is suggested to contact the local distributor Excel, who will help you with this matter: https://www.tp-link.com/bd/support/contact-technical-support/#Hotline-Support Good days.

@AsifEmon Hello, Glad to hear that the ping spikes issue was resolved by upgrading to an older version. May I know which version are you on now? Kindly show us the firmware screenshot, thanks a lot~

@Nike-Tom After the firmware update, did you reset the C6 to factory defaults and reconfigure it from scratch? If not yet, please give it a go. BTW, when your devices cannot connect to the C6...