CDMA or GSM?

Hi,

wanted to know if the Xfinity mobile is CDMA or GSM? 

I know xfinity uses verizon network but as per this new verizon is no longer provisioning new lines for CDMA so just wondering

https://www.verizonwireless.com/support/knowledge-base-218813/

I have one plus 7 and wanted to know will this work on XM or not.

TIA