Yes they will happily trade it for a new one.
Yes
Yes you can do exchanges at the store
Yes you can bring it back. A fee may be charged If the box is damage.
Don't call, just go to the store.
Yes you can. The staff is very knowledgeable.
You can drop off old one there not sure of exchange. For me they shipped me a box and I took old one there to return. You should call comcast and ask
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