--- product_id: 299395326 title: "Arris CM820A (Comcast Version) DOCSIS 3.0 Cable Modem [Bulk Packaing] (Renewed)" brand: "amazon renewed" price: "529 kr" currency: DKK in_stock: true reviews_count: 6 url: https://www.desertcart.dk/products/299395326-arris-cm820a-comcast-version-docsis-3-0-cable-modem-bulk store_origin: DK region: Denmark --- # Gigabit Ethernet DOCSIS 3.0 8x4 Channel Bonding Arris CM820A (Comcast Version) DOCSIS 3.0 Cable Modem [Bulk Packaing] (Renewed) **Brand:** amazon renewed **Price:** 529 kr **Availability:** βœ… In Stock ## Summary > πŸš€ Elevate Your Internet Experience! ## Quick Answers - **What is this?** Arris CM820A (Comcast Version) DOCSIS 3.0 Cable Modem [Bulk Packaing] (Renewed) by amazon renewed - **How much does it cost?** 529 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/299395326-arris-cm820a-comcast-version-docsis-3-0-cable-modem-bulk) ## Best For - amazon renewed enthusiasts ## Why This Product - Trusted amazon renewed brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **24/7 Support:** Get assistance anytime, 365 days a year! - β€’ **Gigabit Ready:** Equipped with a 10/100/1000 Base-T Ethernet interface. - β€’ **Seamless Compatibility:** Ensure your modem works with your ISP before purchase! - β€’ **High-Speed Connectivity:** Experience superior throughput with 8x4 channel bonding. - β€’ **Future-Proof Performance:** Backwards compatible with DOCSIS 1.0, 1.1, and 2.0. ## Overview The Arris CM820A DOCSIS 3.0 Cable Modem is a renewed, high-performance modem designed for Comcast and other ISPs. It features 8x4 channel bonding for enhanced speed and is backwards compatible with older DOCSIS versions. With a Gigabit Ethernet interface and 24/7 customer support, this modem ensures a reliable and efficient internet connection. ## Description Arris CM820A (Comcast Version) DOCSIS 3.0 Cable Modem [Bulk Packaing] (Renewed) ## Features - NOTE: Customer's must verify if their cable company will allow them to use this prior to purchasing even if they have the exact same model some of these modems are pre-programmed from their cable company so their cable company must update the firmware in order for it to work in some cases. - Verify compatibility prior to purchasing. Ask internet provider to format item if it is not working through either a firmware update or the internet provider resetting the item to format to the customer's network connection. - Backwards compatible with DOCSIS 1.0, 1.1, and 2.0 . CM820A DOCSIS 3.0 compliant. Comcast Compatible! (and more!) - 8x4 downstream/upstream channel-bonding with superior throughput. Note: please contact the ISP to check the compatibility. Note: please contact the ISP to check the compatibility. 10/100/1000 Base-T Ethernet interface - Best troubleshooting advice for this item: 1) Always verify if your cable company will allow you to use or own this item 2) Always do the online setup first, most of the time the firmware update will be automatic this way if it is needed. 3) Demand a supervisor if a CSR (customer service rep) will not assist in the setup 4) Customers can always contact us through messaging for assistance we respond to all messages with 24 hours 365 days a year. ## Images ![Arris CM820A (Comcast Version) DOCSIS 3.0 Cable Modem [Bulk Packaing] (Renewed) - Image 1](https://m.media-amazon.com/images/I/61qeL8v3YxL.jpg) ![Arris CM820A (Comcast Version) DOCSIS 3.0 Cable Modem [Bulk Packaing] (Renewed) - Image 2](https://m.media-amazon.com/images/I/518+QY1-JbL.jpg) ![Arris CM820A (Comcast Version) DOCSIS 3.0 Cable Modem [Bulk Packaing] (Renewed) - Image 3](https://m.media-amazon.com/images/I/61M04s9c2DL.jpg) ![Arris CM820A (Comcast Version) DOCSIS 3.0 Cable Modem [Bulk Packaing] (Renewed) - Image 4](https://m.media-amazon.com/images/I/71oeHdzsKNL.jpg) ## Questions & Answers **Q: Does this work with rcn/astound? it’s the same model they rent out currently.** A: Yes for RCN and xfinity and buy your router too. **Q: Can this be used for a phone jack modem only?** A: No, cable ef input.. **Q: Will it work with Xfinity,?** A: YES and am using right now. Get a spare modem and router with a backup laptop for the future.. **Q: does it have power cord?** A: Mine came with a power cord. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars GOOD ! *by C***T on Reviewed in the United States on December 16, 2023* Not the latest technology,but it does what it's supposed to I have the lowest tier Internet. So I purchased this and a router. Spending On older and/or refurbished gear $60 ,Saving $8 a month having to rent my gear from the cable ISP..... PRICELESS! ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars So far so good *by S***E on Reviewed in the United States on June 12, 2023* Only had it for a couple months but it seems to be working fine. ### ⭐⭐⭐⭐ 4.0 out of 5 stars Cheap modem gets the job done *by I***A on Reviewed in the United States on March 25, 2022* Barebone modem, works with Comcast Xfinity pretty well --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.dk/products/299395326-arris-cm820a-comcast-version-docsis-3-0-cable-modem-bulk](https://www.desertcart.dk/products/299395326-arris-cm820a-comcast-version-docsis-3-0-cable-modem-bulk) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-05-17*