Review on 💨 ARRIS Surfboard TM822R - Docsis 8X4 Cable Modem/Telephone Certified for XFINITY | Download Speed: Up to 343 Mbps by Geoff Foster

After spending over 2 hours with the Xfinity installer, checking the internet and then doing a manual install, I can confirm that this modem works 100% for both internet and Xfinity voice. The speed is amazing and the voice is crystal clear. I highly recommend a firewall/wireless router as it's a gateway only, but it replaces the Comcast gateway, saving you $10 a month and ultimately paying for itself. Here's how it works (along with one caveat). If possible, install the modem yourself! The installers know very little about 3rd party modems and will tell you that the device is outdated/unsupported/cannot be activated etc. We had to call an installer because we didn't have a cable outlet. However, our installer went so far as to cancel our phone plan when he couldn't get Arris to work because we had told him not to install a Comcast modem - we had to get him to reactivate the plan so we could use our router install it yourself! The truth is that this modem is 100% supported as stated on the Xfinity website. All you have to do is plug it in and call to activate it. However - and this is the important part people miss - there are TWO activations. One for internet, one for phone. After you have activated the Internet, you should ask to be taken to the phone setup so that they can activate the phone. Our installer spent an hour on the phone resending the internet activation signal and wondering why the phone wasn't working. After he left, I called Xfinity from my cell phone and the phone setup agent got the modem up and running within minutes. I'm very happy with the speed of the modem compared to the Xfinity modem and I'm very happy that I don't have to pay a monthly rental for the Xfinity modem. For the average client (100MB or less) this is the correct modem.