AT&T Cable Modem Router: Change/Replace w/ Personal Cable Modem Router

Hello:

Is there anyone who might be able to lead me in the right direction regarding a few questions that I am eager to have answered that pertain to Cable Modem Routers?

Specifically, I would like to change/replace out the cable modem router that AT&T issued me when they first installed my internet service back in July of last year.

If I recall, when the AT&T technician came out to install both my U-verse cable and the internet, he had mentioned that AT&T requires their customers to use their specific cable modem routers – which at the time of install, they issued me a Motorola Aris BGW210-700. However, the specific cable modem router that I have (which is the one I would like to use) is a Netgear C7000 – Nighthawk AC1900 WiFi Cable Modem Router.

Is there anyone who might be able to tell me if it is possible to change out the cable modem that AT&T issued for a different one? If anyone is willing to share their experience and/or offer any insights that pertain to this topic question – it would be much appreciated.

Thank You!