they say they wont replace it? that's bullsh!t i'd call in and say im exchanging this modem or im getting another isp, trust me they will let you return it, and as far as i know if you show up at a service center with a copy of a bill and the hardware + power cord they will give you a new modem on the spot, i've been threw about 5 modems with comcast they never gave me a problem about returning any if you're paying the 3.00 a month rental charge they have to exchange it