Hi, all:
I bought this modem last March, use it less than 1 year. It is compatible with Xfinity. Very new, very useful, good speed. I can take it to campus.

https://www.amazon.com/NETGEAR-CM500-1AZNAS-download-Certified-Cablevision/dp/B06XH46MWW/ref=sxin_0_ac_d_pm?ac_md=1-0-VW5kZXIgJDc1-ac_d_pm&cv_ct_cx=netgear+cm500&keywords=netgear+cm500&pd_rd_i=B06XH46MWW&pd_rd_r=1c5be860-2fdf-404c-a02a-9a812cf8deb5&pd_rd_w=Hv0Rw&pd_rd_wg=yLWLA&pf_rd_p=ef07af27-e48f-451d-ab63-8b6b216a0bc3&pf_rd_r=TS5J3B0TVF456DVRNNV2&psc=1&qid=1580249403&sr=1-1-22d05c05-1231-4126-b7c4-3e7a9c0027d0