topic Re: Xbox Live party chat and MTU problem in Broadband

Xbox Live party chat and MTU problem

Dubs — Wed, 05 Jul 2023 20:05:24 GMT

Hi, i have been using Three 5g for a week now and while i am very pleased with my DL speeds, i cannot join people in xbox live party chat. The xbox says i have an mtu problem. I have tried port forwarding, putting my xbox in the dmz and turning off the firewall but nothing works.

Re: Xbox Live party chat and MTU problem

DrGravity — Thu, 06 Jul 2023 09:27:32 GMT

What firmware do you have on the router? You can see via the app or router settings and the version will end with bXX (where XX will be a number). I'll wager it's the latest b14 version.

The MTU issue has been present since last year and does impact gaming but it never prevented Xbox parties before in my experience. I've had the same problem recently since the router auto updated to the b14 firmware. It seems to have broken UPnP / port forwarding

Re: Xbox Live party chat and MTU problem

Dubs — Sat, 08 Jul 2023 08:44:51 GMT

Hi mate, i have the ZTE MC801a and am on B15

Re: Xbox Live party chat and MTU problem

TheJunglist — Sat, 08 Jul 2023 13:50:00 GMT

After trying several different things static ip>add to dmz, port forwarding etc with no joy. I've resolved the issue described on my son's xbox series s by enabling UPnP in the router's settings, then by selecting a different port on the xbox the NAT type went from strict to open and issue is resolved - You may have to try a few different ports, luckily it was the first port I tried! Hope this helps

Re: Xbox Live party chat and MTU problem

CSpec01 — Sat, 19 Aug 2023 10:41:12 GMT

I've tried this but sadly it only works within a few seconds of updating the router settings to UPnP enabled. Giving it some time and testing again shows the issue is still present.

Re: Xbox Live party chat and MTU problem

Neverworksright — Mon, 25 Sep 2023 17:42:36 GMT

So after 2 years of playing a lot of Xbox games online with voice chat I now to have the Mtu issue and after calls to Xbox and zte I painfully clear it’s a 3 issue and to be fair as usual the call centre staff were useless is this ever going to be resolved?

Re: Xbox Live party chat and MTU problem

crabmandoo — Wed, 25 Oct 2023 18:23:47 GMT

I have the same issue, have you found a result?

Re: Xbox Live party chat and MTU problem

Neverworksright — Thu, 26 Oct 2023 10:57:17 GMT

It’s to do with the mast as mine now works again nothing changed

Re: Xbox Live party chat and MTU problem

JonathanB — Thu, 26 Oct 2023 11:06:05 GMT

Thanks for confirming this @Neverworksright, that seems to line up with the testing and research I've done too.

Unfortunately it does seem to be an issue caused by either signal strength, or congestion in the network. The network's MTU is 1500 in normal conditions.

There's a couple of things that may help, UPNP enabled to help give an open NAT, using an Ethernet rather than Wi-Fi if possible, the router being positioned as optimally as possible, however coverage, network maintenance, and contention between multiple users can still cause this to happen. We're always investing in the infrastructure though, so hopefully there'll be less of this issue as time goes on.

Thanks,
Jonathan

Re: Xbox Live party chat and MTU problem

Shhsjd — Sun, 02 Jun 2024 12:03:43 GMT

Any confirmed fixes? Same problem, party chat not working

Re: Xbox Live party chat and MTU problem

Darren5688 — Fri, 25 Oct 2024 21:34:34 GMT

I’ve had this problem for 6 months. Basically you was sold a lie like many other people. You simply can’t use three broadband for gaming.

Re: Xbox Live party chat and MTU problem

Ben1504 — Tue, 04 Nov 2025 12:04:39 GMT

I had this same issue kept disconnecting from party chat, what worked for me was changing APN from ‘3internet’ to ‘three.co.uk’ all is working fine now.

Re: Xbox Live party chat and MTU problem

Ben1504 — Tue, 04 Nov 2025 12:07:45 GMT

Change APN setting from ‘3internet’ to ‘three.co.uk’ works fine now for me