Arris TG862G/CT xfinity supplied modem help

[Steve40th]

My inlaws have this modem wirless pho e cable mode with Xfinity and pay for 50Mbs wifi called boost. They get nothing decent for range and they use three major WiFi dependent products in another room. Can I plug another wireless router into this modem?

 

[rototiller]

Yes, you can either make the wireless router that you plug into the modem an A.P. or you should be able to turn the router functionality off of the modem and make it a bridge and thus the new wireless router will become the main router.