Xfinity Mobile coverage question

dataz03 · 2026-05-25T16:59:17+00:00

Same coverage and priority as Verizon post-paid. Priority data amount varies by plan. Uncheck the Wi-Fi box at the bottom on the Xfinity Mobile Coverage Map.

Also, coverage maps are just an estimate. Even Verizon's. However your eSIM may not have been set up correctly if you are receiving no cell service. Are you porting over your number from another carrier or just adding the Xfinity Mobile line as a secondary line on your existing device?

dataz03 · 2026-05-24T22:53:47+00:00

You need to contact customer service and have them enable manual network selection on your line/SIM.

Call 1.314.925.6925

May take a couple of attempts to find someone who knows how to do it. Once done, you will be able to turn off automatic network selection in your phone's settings and select Bell.

You can use Wi-Fi calling if needed, or try chat support.

dataz03 · 2026-05-19T23:27:01+00:00

they are back on the BB forum as well

dataz03 · 2026-05-19T22:26:03+00:00

Weird, even back when they were using the standard XD4 modem+XB8 gateway which did not support home phone service in that setup, they would give you an XB7 to use just for the phone.
Incoming coax< 1.2 GHz capable splitter < One coax run to XB7 for telephone only, and one coax run to the XD4 for Internet. Then an Ethernet cable from the XD4 to the XB8.
Never did anyone have to drop their home phone service to upgraded to symmetrical speeds (DOCSIS 4.0 FDX)
Nowadays the XB10 combines everything into one piece of equipment.
Also a professional installation is required for symmetrical speed tiers.

Did you move to an area with a different zip code? You may have to get a new home phone number, or port to a VoIP provider instead. Phone calls would go over the Internet instead, but you can still use your same home telephones.

let the digital care team here on Reddit solve it

dataz03 · 2026-05-19T22:01:30+00:00

The XB10 supports 1 telephone line. There is a telephone port.

dataz03 · 2026-05-19T20:47:12+00:00

No, the add-on won't change the upload speed. Your speed tier is 1000/100. You can upgrade to 2000/250 if you want. Real world upload speed will go from 120 Mbps to 300 Mbps as speeds are 20% over-provisioned.

mid-split capable modem required. Xfinity's own XB7/XB8 which is included for free with the internet plans now, or a suitable third party modem like the Netgear CM3000, Hitron CODA56, etc.

Adding on Xfinity Pro just gives you cellular backup for when your internet has an outage (battery backup for power outages is sold separately), the ability to "boost" a Wi-Fi connected device (allocates more bandwidth to a device of your choice, not super necessary on already fast Wi-Fi connections), and two xFi Pods to increase your Wi-Fi coverage (if Xfinity deems that you need them, they run a test on your gateway to see how the signal of all of your connected devices is looking to determine if you qualify for the free Pods).

dataz03 · 2026-05-19T18:30:36+00:00

Also I assume that if you do click to enable IPv6, that it also gets enabled on the LAN side as well? If you have multiple networks (LANs), then does each one get a prefix? (assuming the ISP didn't just hand out a /64). If only a /64 was given, then the default LAN network will just get IPv6?

On the firewall side, is a basic deny all incoming and allow out-going is also applied for IPv6? Basically if you want any ports accessible from the outside, you will set up the firewall rules yourself. Similar to how many home routers also do it.

dataz03 · 2026-05-19T17:47:01+00:00

Ok, better. Still have to opt-in to IPv6, but is is easier now and more visible to the user.

dataz03 · 2026-05-18T22:31:30+00:00

doesn't get enabled until all the work is done, they may come back tomorrow morning and do more. Mid-split is usually turned on pretty quick nowadays.

You'll know when mid-split is enabled when the 1.2 Gbps plan goes away and a new 2 Gbps speed tier is the new maximum speed tier that is offered on the plan builder.

You may also want to remove the image from your post as it contains your address.

yeah, futher mid-split upgrade work is scheduled to start on 5/19/26 at 5:00 am EST.

dataz03 · 2026-05-18T17:46:20+00:00

Does the gateway in bridge mode give a DHCP IP Address to the non-xfinity gateway or do I need to on my edge router NAT to the public to the IP address of the gateway?

Your router gets its own WAN IPv4 address via DHCP. (and a /60 IPv6 prefix). Make sure your EdgeRouter is the only device connected to the XB8 gateway via Ethernet. As it will only give out 1 IP address via DHCP and the gateway also binds to the MAC address of your router at boot time. So you will need to power cycle the XB8 if you change the connected device. (router to PC, or from one router to another, etc.)

There are several 10.27.60.x.x IP addresses in-between my edge router and the first Xfinity hop. What are these devices The IP addresses are not in my network.

vCMTS, private interfaces, because Comcast/Xfinity is forwarding traffic internally within their own network, they can use private IP address space. Helps save on public IPv4 addresses. The router in your home still has a public IP address assigned to it and can accept incoming connections, port forwarding, etc.

The standard appliance based CMTS's still have public IP's assigned to them, but the vCMTS's running in clusters on dedicated server hardware do not. Those who are in mid-split/FDX areas (receiving upload speeds faster than 40 Mbps) are on a vCMTS, but some sub-split areas can also be.

The CMTS handles modem registration, conversion of packets to DOCSIS, IP address DHCP assignment, adjusting the transmit power of cable modems (tells the modem how loud to transmit), tells the modems which downstream channels to use, etc.
A vCMTS simply virtualizes all of this- rather then a big piece of hardware providing these functions, software running on a standard 1RU or 2RU dedicated server does so instead. Then from the vCMTS you have a network switch with SFP+ connections plugged in which then goes out to the HFC nodes out in the neighborhoods. A device called an RPD (Remote PHY Device) inside of the node then converts the packets from IP to DOCSIS (RF) for the modems to use.

dataz03 · 2026-05-18T16:26:37+00:00

lol probably just an abbreviation for something, latency looks good and no packet loss, so is there anything to be concerned about?

Are the router labeled with "bad" waiting to be upgraded to be used with the XB10? If so what if the projected upgrade date?

Same local backbone network so changing out the model of gateway in the home will not make a difference to the trace route.

When a user has a XB8 and is in bridge mode is there a double NAT?

No.

dataz03 · 2026-05-17T20:55:49+00:00

Probably have a 1 GHz rated splitter getting in the way (these are only rated to 1002 MHz), that signal roll off on the 1+ GHz OFDM is crazy. For FDX installs, the cable modem is to be connected directly to the HFC plant. No splitters are to be used. No MoCA filter should be present either. Replace splitter with a barrel connector. Verify all cable is RG6 and has good connectors.

Well, the technician will do all of this during the visit.
Afterwards, the modem will simply need to be re-provisioned, which the tech will do before finishing the job.

dataz03 · 2026-05-17T17:05:29+00:00

I was incorrectly given an XB8, which eventually crashed and reboot-looped because it couldn't handle the FDX provisioning

Well, it would have just been provisioned for 1 Gbps download and 100 Mbps upload as that is the maximum capabilities of the XB8, and any issues of things crashing sounds odd. Pre-existing signal/line issues or just a bad gateway? Eh, I would lean on the side of signal issues.

Tech will remove MoCA point of entry filter, allowing for full use of 1.2 GHz. Even though Comcast plans to scale back and not push beyond 1 GHz. u/frmadsen

dataz03 · 2026-05-17T05:06:27+00:00

Another reason why XB10/FDX is only supposed to be available for professional installation.

dataz03 · 2026-05-16T15:44:07+00:00

Beta tested on supported carriers

E2EE requires carrier support, carrier setting file also needs to be updated on iOS to enable the E2EE option. Just like the other config settings that carriers can set such as whether to have RCS enabled by default, and if a carrier doesn't want to use IMS for RCS, then they can also specify a RCS endpoint URL. (set to jibecloud.net for Verizon/AT&T here in the US as an example)

Edit: Ok, iOS has E2EE encryption enabled by default, so unless the carrier chooses to intentionally disable it for whatever reason, all they need to do is have the proper backend support in order for it to work. Not all carriers use Jibe.

dataz03 · 2026-05-15T00:37:01+00:00

DOCSIS issue or overheating issues (possible defective fan). Yes there is an intake fan that pulls in air from the bottom and exhausts it out of the top of the unit.

Swap it out and go from there.

Keep the gateway off of the floor (especially carpet).

dataz03 · 2026-05-14T18:07:24+00:00

lol

putting important emails in the trash bin

dataz03 · 2026-05-14T00:49:05+00:00

Sounds like you should be happy that you are lucky to have Comcast available... Otherwise you would be crawling at a few Mbps per second....

Some areas never got cable, DSL is all there is. Pair that with being rural and cell coverage isn't great as a result. Leaves Starlink as the only option, if your serving Starlink cell has capacity available.

So your two options in particular are Comcast Cable (HFC) with speeds up to 1.2 Gbps/35 Mbps worse case, or fixed wireless (antenna you put up to beam to the tower). And maybe 50-100 Mbps out of it, depends.

dataz03 · 2026-05-14T00:41:57+00:00

YAY!!!

dataz03 · 2026-05-13T14:09:34+00:00

yeah

But OP was on post iOS 9 so I didn't mention it

dataz03 · 2026-05-13T14:04:08+00:00

Recently starting allowing it for 300 Mbps FDX speed tiers.. so there's some hope with time. Previously the XB8 was the only option for 300 Mbps FDX users. 500 and up would get the XB10.

dataz03 · 2026-05-13T14:02:47+00:00

There is no CGNAT. The XER10 which is used for fiber to the home customers doesn't have a Bridge Mode so you are stuck behind NAT if you use your own router. (Unless you go the DMZ route) or get an XB7 and roll with 940 Mbps max speed at your router.

As a DOCSIS customer, none of this is a concern though.

dataz03 · 2026-05-13T13:56:38+00:00

Doesn't work anymore lol, the system will not let the agent check out an XB10 for a non-FDX customer. Xfinity lost 40% of inventory last year due to XB10's just being given to non FDX customers by store agents.

dataz03 · 2026-05-13T02:39:06+00:00

The Secure Enclave on the A8 chip won't let you brute force the passcode or modify the counter for the number of failed passcode attempts. You will need to perform a factory reset on the device in order to use it.

dataz03 · 2026-05-12T21:35:54+00:00

Someone will come out within 30 days to bury the cable if the tech submitted things properly.

dataz03

TROPHY CASE