At the end of Nov. 2017. I experienced service interruptions and called to support. They were not able to restart my modem SB 6121 and suggested technician come. He found nothing wrong on my side and suggested to replace this model with the new one. I found in blogs that in Feb. 2016 Comcast pushed security patch and since that time Comcast couldn’t restart such type of modem. I called to support and asked don’t charge me for a tech visit. Nevertheless, I was charged $60 for the tech visit. After that, I called 3 times to support and representatives promised to check with the manager to credit my account $60 and let me know but NOTHIG happened. This is ridiculous! I am thinking to use unlimited Internet option at T-mobile account and finish my experience with Comcast.
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