---
product_id: 359905236
title: "ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black"
brand: "arris"
price: "20010201₫"
currency: VND
in_stock: false
reviews_count: 5
url: https://www.desertcart.vn/products/359905236-arris-surfboard-t25-docsis-3-1-gigabit-cable-modem-comcast
store_origin: VN
region: Vietnam
---

# DOCSIS 3.1 tech - 10x faster speeds 2 telephony ports for digital voice 2x 1 Gbps Ethernet ports ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black

**Brand:** arris
**Price:** 20010201₫
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Own the fastest lane in your home network!

## Quick Answers

- **What is this?** ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black by arris
- **How much does it cost?** 20010201₫ with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/359905236-arris-surfboard-t25-docsis-3-1-gigabit-cable-modem-comcast)

## Best For

- arris enthusiasts

## Why This Product

- Trusted arris brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Integrated Voice Support:** Stay connected with two telephony ports supporting Xfinity Voice, turning your modem into a digital phone hub.
- • **Save Big, Own Your Modem:** Slash your cable bill by up to $168/year by ditching rental fees and owning your high-performance modem.
- • **Blazing-Fast Gigabit Speeds:** Harness the power of DOCSIS 3.1 for lightning-fast internet up to 800 Mbps, perfect for 4K streaming & VR gaming.
- • **Dual Gigabit Ethernet Ports:** Connect multiple wired devices simultaneously with two 1 Gbps ports for seamless, lag-free networking.
- • **Effortless Setup & Security:** Activate quickly via the SURFboard Central App with preset Wi-Fi security—no tech headaches, just instant connectivity.

## Overview

The ARRIS SURFboard T25 is a DOCSIS 3.1 cable modem designed for Xfinity Internet & Voice plans, delivering up to 800 Mbps speeds with two 1 Gbps Ethernet ports and dual telephony ports. It offers advanced channel bonding for ultra-reliable gigabit performance, supports digital voice services, and helps users save on monthly rental fees. Ideal for professionals seeking high-speed, secure, and cost-effective internet with integrated voice capabilities.

## Description

The T25 is a DOCSIS 3.1 cable modem – the newest technology being offered by cable providers – with two telephone lines for digital voice support, plus two 1-gigabit Ethernet ports for connecting to a Wi-Fi router or other wired devices. It’s capable of bonding up to 32 downstream and 8 upstream DOCSIS 3.0 channels or 2 x 2 OFDM DOCSIS 3.1 channels, providing increased bandwidth for true gigabit speed capability, perfect for things like 4K ultra-HD video streaming and Virtual Reality gaming! It is the perfect choice for gigabit speed internet plans and saves money on monthly modem rental fees.

Review: I installed the Arris T25 modem about a week ago. It replaced an Arris Surfboard 6190. I bought the T25 to use Xfinity Voice which is part of my plan but which I never used. The modem has been operating since installation without any incidents. Internet download speeds went from 600Mbps to 900Mbps. The telephone line has performed perfectly. Installation was not as straightforward as I would have liked. Since I don't have an exceptionally strong cellular signal where I live I first tried connecting a laptop directly to the modem and using the Xfinity activate webpage from a browser. I got nowhere trying that. I always ended up back on a webpage that told me to download and use the Xfinity app on my smartphone. Despite the weak cell signal I decided to try the Xfinity app from my phone. Scroll down in the app to where it says, "Got new equipment to set up? Activate now." It worked fine. The app only asks for the modem's HFC MAC ID, not the MTA MAC ID. After a few minutes of watching the lights on the modem cycling the app reported that the modem was online and provided the telephone number assigned to it. That was it - internet working, telephone working, no call to Comcast required. I connected my Asus router to the modem and I was good to go. Update: A frequently asked question is whether the modem can be connected to extension phones in the home. The answer is yes. However, my first try wasn't successful. I connected the modem to a wall jack that's connected to all of the extension phones after first disconnecting the phones from my current landline supplier at their demarcation box. The phone light on the modem started blinking as if the line was in use, but it wasn't. The displays on my extension phones also showed "Line in Use." I disconnected the modem from the phone jack to think about what the issue could be. A few days later I tried again but this time thought to disconnect a printer/fax from its phone wall jack. All of the extension phones now worked perfectly. I'm not sure why the printer/fax would cause a conflict when it was not in use, but all of the extension phones are working fine now. I can live without the fax if I have to. Update March 14, 2024: I think it's helpful to update reviews after a product has been in use for some time. I've been using this modem for internet and phone since November of 2022, and its performance has remained absolutely solid. I have not had to reboot it once. Very happy.
Review: Needed to up grade from my previous modem which was working well but getting a bit long in the tooth. The install was straight forward and pretty easy to activate my internet setup and connection....but trying to a get my phone activated was a real pain. Spoke with Comcast to verify my MTA and HCF mac address' and to get my dedicated phone line working, no problem. Comcrap wasn't able to get a dial tone after several attempts, so they suggested I contact the modem mfg. that it might be defective. So I called the mfg, they were very helpful with trying to help me resolve this issue, but in the end they said to just return it for a replacement, which I did. Got the second modem very quickly and installed it...same thing, no phone connection. Called Comcast and went through the whole thing again with them, they ended up telling me they were sending this to the next level of their tech support and would be back in touch in several days.....guess what, no call back after 3 days. Called Comcast back again for the 4th time and spoke to the first person from tech support that picked up the phone. Had a feeling this was going to go badly, but to my amazement she was able to do what 3 other calls to tech support couldn't, get my phone service, which is provided by them, connected. I can highly recommend the ARRIS T25, it is really easy to install, unless you have phone service from Comcast, it runs my max internet speed easily, is compatible with Comcast specs and will save you the $14/mo rental charge if you use a Comcast modem. Excellent product.... I hope this ARRIS model lasts as long as my previous one. A side note, this functions as a modem only with phone service, it's not a modem/router combo, so no WiFi. I use a separate router for my Wifi connections.

## Features

- Save Money: Own your modem and save. Reduce your cable bill up to $168 dollars per year in cable modem rental fees. For use with Xfinity Internet & Voice Service. Preset Wi-Fi Security: No
- Modem Technology: DOCSIS 3.1 is the newest technology available from cable internet providers. Its 10x faster than DOCSIS 3.0, provides better security, reduces lag while gaming & enables multi-gig networking (ability to run fast speeds on your copper cable from your internet provider).
- Simple and Secure Set-up: Plug-in the device, download the SURFboard Central App, and follow the instructions to activate the modem. Connect to a Wi-Fi router for networking.
- Compatibility: The SURFboard T25 is compatible with Xfinity Internet & Voice service and is approved for cable internet speed plans up to 800 Mbps.
- Xfinity cable modem 3.1 compatible internet computer networking modems approved docsis docis3.1 1 gig best for high speed with fiber optic gaming gigabit wifi 6 voice 2 telephony ports 800 mbps speed t 25 internet and voice plans

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07MGPPNZD |
| Are Batteries Included | No |
| Brand | ARRIS |
| Color | Black |
| Customer Reviews | 4.0 4.0 out of 5 stars (1,667) |
| Date First Available | 22 October 2019 |
| Item Weight | 762 g |
| Item model number | T25 |
| Manufacturer | CommScope |
| Number of Ethernet Ports | 4 |
| Product Dimensions | 5.4 x 15.88 x 19.05 cm; 762 g |
| Series | T25 Xfinity Docsis 3.1 Voice Cable Modem |
| Voltage | 100240 Volts |

## Product Details

- **Brand:** ARRIS
- **Compatible devices:** Personal Computer, Smartphone
- **Connectivity technology:** Coaxial Cable, Ethernet
- **Internet service provider:** Xfinity
- **Product dimensions:** 6.8L x 18.2W x 26.8H centimeters

## Images

![ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black - Image 1](https://m.media-amazon.com/images/I/71znKIOnPhL.jpg)
![ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black - Image 2](https://m.media-amazon.com/images/I/51qLvoTb8OL.jpg)
![ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black - Image 3](https://m.media-amazon.com/images/I/71G34O0dH0L.jpg)
![ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black - Image 4](https://m.media-amazon.com/images/I/51cgpe5C2EL.jpg)
![ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black - Image 5](https://m.media-amazon.com/images/I/71uY-OZkYRL.jpg)

## Questions & Answers

**Q: does it work with Mediacom cable and voice service?**
A: No, T25 is compatible to work only with Comcast Xfinity's cable internet subscription

**Q: Does this model still use the Intel Puma chipset?**
A: It has the PUMA 7 chipset -> the 5,6 & 7 chipset are all vulnerable to the TCP issue -> but PUMA 6 is the most impacted by this issue. But you have to be targeted for it to be an issue and is only really a problem if you do "fast twitch" gaming activities while targeted.  A series of very many small TCP packets can be sent in a way that overwhelms the cable modem's buffers causing latency and jitter to spike to 100-150 ms while being targeted.  There is a test on DSL reports that will test this TCP vulnerability for the PUMA chipset. Intel (chipset owner -> they bought PUMA from Texas Instruments several years ago) they did come out with a patch for this issue after about a year of it being in the wild ->  my understanding is that the patch has been out since mid 2018 and should be pushed down to your modem by your ISP.

I bought this modem (T25) and after having it provisioned by COMCAST/XFINITY  -> I ran the TCP PUMA test and my modem passed without issue & performed just as well as the rental modem. 

You can buy this modem without issue or fear of this PUMA chipset issue...

Latency Test Results from PUMA TCP Test

35ms : x
36ms : xxxxxxxxxx
37ms : xxxxxxxxxxxxx
38ms : xxxxxxx
39ms : xxxxxx
40ms : xxxx
41ms : xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
42ms : xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
43ms : xxxxxxxxxxxxxxxxxxxxxxxxx
44ms : xxxxxxxxxxxxxxxxxxxxxxxx
45ms : xxxxx
46ms : x
47ms : xxxx
48ms : xxxxx
49ms : xx
50ms : x
52ms : x

**Q: my arris tm822r has battery backup, which is great for when power goes out. does this modem have a battery backup?**
A: No, T25 does not has the battery backup but you can use an external UPS power supply in case of power outages

**Q: does it work with cox cable and voice service?**
A: Cox has support for ARRIS / Surfboard TM3402 
here is a list. 
https://www.cox.com/residential/support/cox-certified-cable-modems.html
best bet is to call them and ask.
besides switching to gigablast and getting VoiP is a much better deal. you can actually save some $$ and get crazy speeds..

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by P***T on 3 November 2022*

I installed the Arris T25 modem about a week ago. It replaced an Arris Surfboard 6190. I bought the T25 to use Xfinity Voice which is part of my plan but which I never used. The modem has been operating since installation without any incidents. Internet download speeds went from 600Mbps to 900Mbps. The telephone line has performed perfectly. Installation was not as straightforward as I would have liked. Since I don't have an exceptionally strong cellular signal where I live I first tried connecting a laptop directly to the modem and using the Xfinity activate webpage from a browser. I got nowhere trying that. I always ended up back on a webpage that told me to download and use the Xfinity app on my smartphone. Despite the weak cell signal I decided to try the Xfinity app from my phone. Scroll down in the app to where it says, "Got new equipment to set up? Activate now." It worked fine. The app only asks for the modem's HFC MAC ID, not the MTA MAC ID. After a few minutes of watching the lights on the modem cycling the app reported that the modem was online and provided the telephone number assigned to it. That was it - internet working, telephone working, no call to Comcast required. I connected my Asus router to the modem and I was good to go. Update: A frequently asked question is whether the modem can be connected to extension phones in the home. The answer is yes. However, my first try wasn't successful. I connected the modem to a wall jack that's connected to all of the extension phones after first disconnecting the phones from my current landline supplier at their demarcation box. The phone light on the modem started blinking as if the line was in use, but it wasn't. The displays on my extension phones also showed "Line in Use." I disconnected the modem from the phone jack to think about what the issue could be. A few days later I tried again but this time thought to disconnect a printer/fax from its phone wall jack. All of the extension phones now worked perfectly. I'm not sure why the printer/fax would cause a conflict when it was not in use, but all of the extension phones are working fine now. I can live without the fax if I have to. Update March 14, 2024: I think it's helpful to update reviews after a product has been in use for some time. I've been using this modem for internet and phone since November of 2022, and its performance has remained absolutely solid. I have not had to reboot it once. Very happy.

### ⭐⭐⭐⭐⭐ Review
*by D***T on 8 April 2021*

Needed to up grade from my previous modem which was working well but getting a bit long in the tooth. The install was straight forward and pretty easy to activate my internet setup and connection....but trying to a get my phone activated was a real pain. Spoke with Comcast to verify my MTA and HCF mac address' and to get my dedicated phone line working, no problem. Comcrap wasn't able to get a dial tone after several attempts, so they suggested I contact the modem mfg. that it might be defective. So I called the mfg, they were very helpful with trying to help me resolve this issue, but in the end they said to just return it for a replacement, which I did. Got the second modem very quickly and installed it...same thing, no phone connection. Called Comcast and went through the whole thing again with them, they ended up telling me they were sending this to the next level of their tech support and would be back in touch in several days.....guess what, no call back after 3 days. Called Comcast back again for the 4th time and spoke to the first person from tech support that picked up the phone. Had a feeling this was going to go badly, but to my amazement she was able to do what 3 other calls to tech support couldn't, get my phone service, which is provided by them, connected. I can highly recommend the ARRIS T25, it is really easy to install, unless you have phone service from Comcast, it runs my max internet speed easily, is compatible with Comcast specs and will save you the $14/mo rental charge if you use a Comcast modem. Excellent product.... I hope this ARRIS model lasts as long as my previous one. A side note, this functions as a modem only with phone service, it's not a modem/router combo, so no WiFi. I use a separate router for my Wifi connections.

### ⭐ Review
*by J***T on 30 November 2020*

I bought this modem as a replacement for an Arris cable modem I already owned. This model is supposed to support newer DOCSIS standards and have faster throughput. And, it is supposed to be compatible with the Comcast Triple Play services including phone. I have had nothing but trouble with this device since I installed it. Once a week it loses connection so you have neither internet access or phone service. This is corrected by rebooting the modem. The next week it happens again. I originally contacted Arris about this problem and was told by their technical support that there was a problem with the signal strength from Comcast. I put up with this for four months and the same problems continued. I called Arris several more times and was told the same thing each time. They denied any problem with the modem. Finally, I contacted Comcast and had a service technician come to my home and look at my setup. He checked everything and found no issues with the signal strength. His comment was the Arris technical support people were misunderstanding the status report which you can get from the modem. I contacted Arris again and told them about the Comcast service visit and the results. They finally agreed to send me a new T25 replacement. I received the new unit in about a week, installed it and then waited to see the results. Unfortunately, the exact same problem persisted. I tried to contact Comcast again to get a return visit from a service technician but was told since I own the modem they would charge me for a service visit. I decided to wait. Since that time I have researched the problem on the web and discovered this is a well known problem with this modem. No one knows whether it is a Comcast compatibility problem and or an Arris problem. But, both companies are pointing fingers at each other and customers are stuck in the middle. I still have this problem and cannot find any resolution. I am considering purchasing a different cable modem. DO NOT buy this cable modem if you want to use it for Comcast service.

## Frequently Bought Together

- ARRIS (T25) - Cable Modem - Fast DOCSIS 3.1 Gigabit Cable Modem , Comcast Xfinity Internet & Voice , Two 1 Gbps Ports, 800 Mbps Max with Xfinity Plan
- TP-Link AX1800 WiFi 6 Router V4 (Archer AX21) – Dual Band Wireless Internet Router, Gigabit Router, Easy Mesh, Works with Alexa - A Certified for Humans Device

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.vn/products/359905236-arris-surfboard-t25-docsis-3-1-gigabit-cable-modem-comcast](https://www.desertcart.vn/products/359905236-arris-surfboard-t25-docsis-3-1-gigabit-cable-modem-comcast)

---

*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-26*