@ratnasekhar 

Hi,

For the product registration, please check BaluGowtham's reply below. There is no need to register the product if you are not from the United States. Just keep your purchase invoice, which will be required for RMA requests:

https://community.tp-link.com/en/home/forum/topic/231452

What's wrong with Onemesh? As you can check from the Onemesh Compatibility List, only C80 supports Onemesh. C60 doesn't support it. So if you mean you cannot set it up, then that is the case. At lease for now.

BTW, C80 supports EasyMesh now, you can set up a mesh network if you have another one that also supports EasyMesh. Visit the thread below to know more about EasyMesh:

What is Wi-Fi EasyMesh and how does it work with TP-Link routers and extenders?