Intermittent connection issues loading/changing site- secure connection failed/site can't be reached

[EDIflyer]

Is anyone else occasionally getting a 'connection down' error from Chrome (or 'Secure Connection Failed' from Firefox) when changing page - if I hit refresh it works fine. At first I wondered if it was the site I was using but have noticed it on multiple different major websites over the past couple of months and not noticed it from other locations where I don't use Three Broadband so does seem to be related to the router/connection (this is via wired Ethernet too, so not a WiFi problem).  I've tried changing DNS server in case that helps but no difference.

It mainly seems to happen when trying to first load a site or (annoyingly) at checkout when a different site is being loaded as part of the checkout process.  It certainly doesn't happen everytime but does happen with reasonable frequency.  I've also noticed I often get it when trying to pull/push from/to Github too and have to do so a number of times for it to work (browsing the Github website works fine).

I'm using a NR5103E with Firmware Version V1.00(ACBJ.0)b14 - I tried rebooting it but to no effect.

[JonathanB]

Hi everyone,

Just to confirm, we're still looking into these issues, I'm awaiting some feedback on some internal testing following the info we gathered a couple of weeks back.

@andym00 and @Nameless thanks for the info about manual band selection, I've passed this on to my colleagues who are investigating, hopefully this helps the investigation.

It sounds like this settings change has helped in these cases regardless, is anyone else able to share if this impacts the frequency of errors when only connecting via bands B1 + N78?

Thanks,
Jonathan

[Nameless]

Hello and thank you for your update

I continued to test Bands B1, B20 and B28 with Band N78 and the PR_END_OF_FILE_ERROR issue is still there however they are far less frequent (Effectively rare in my case) compared to using Band B3 with no single website being a common breaking point...

I then started to test without Band N78 for a limited time however that would severely limit broadband speeds to the 4G limits and that is not really an option when paying for a 5G service... Needless to say, I did not encounter the issue in that limited test however it was not as intensive compared to my usual tests

My guess would be that there is some handover issue between Band N78 and the 4G bands which is magnified most with Band B3 compared to the others

At some point I used to be connected to Bands B1, B3 and N78 twice according to the router (An NR5103EV2) although lately it has been Bands B1 and N78 twice instead - I am not sure why

(For completeness, Cloudflare's WARP is only affected by changes to the overall broadband speed such as disabling Band N78)

I will continue with Band B3 disabled for now and will continue testing

[torz77]

I'm happy to test this, but digging around in my Huawei H122-373, I can see no location that the band selection can be altered. Am I missing something, or is this locked out on my router?

Edit: Scratch this. I've found a way to test this by hacking around in javascript. Will do a bit of testing when I get a bit more free time

[Nameless]

From my recent testing experience, it seems that Band B3 causes the PR_END_OF_FILE_ERROR to become far more frequent compared to Band B1 however it is still present on both bands but much rarer to encounter

If you are able to, try testing your connection with Band B3 disabled

[MEid]

Still having this issue, unable to use my work laptop unless I switch to my phone's hotspot so not sure if this is worth it anymore.

[Nameless]

To inform you all because it is nested, there has been an update
(You can put those pitchforks down for now but you may wish to use them for decorations tomorrow 👻 )

[JonathanB]

Thanks for linking this @Nameless. Okay I'll relent on this point. I don't personally like "no news" updates, but this issue has continued for an unprecedented time, so I'll commit to more regular posts on the thread until this is solved.

Whether there's news or not, I'll let you all know on Monday either way, and continue to update at least once a week.

[Nameless]

Thank you for your reconsideration - Please understand that from our side as customers, having a regular update, even if there are no changes, is always better than having no update whatsoever as the former shows interest and implies that the issue is being looked at as an active case whereas the latter shows ignorance and implies that the issue is being ignored, even if that is unintentional...

Thank you for your update and we look forward to the next update

[Nameless]

This is a check-in and a reminder to keep checking your broadband options

There have been no significant changes for myself

(This is yet another prompt for one of Three's staff members of any kind to mention a brief update, even if it's a "There are no changes" message)

[Nameless]

Three days later and nothing from Three - I could have placed a bet and would have won some money 🤔

I believe that now is the time to shift away from funding Three however, if you must use their services due to availability limitations, I would recommend changing to a cheaper MVNO instead as it would save you money and give Three even less money

I will keep checking this thread for a solution whilst I am still with a Three MVNO however new offers are just around the corner

Keep checking your options

(This is another prompt for one of Three's staff members of any kind to mention a brief update, even if it's a "There are no changes" message)