This is pointless, without the information requested we can't assist. Endlessly repeating the same thing doesn't help.
This is going to sound harsh but I'm going to say it anyway.
You posted here wanting help. Others are trying to provide that help but you seem more intent on whinging about poor service, harking back to 2021, throwing in irrelevant information & ignoring questions you've been asked. If you want the Community to help then you need to engage & reply directly to questions you're asked.
If you don't want to do that then either call BT from a mobile/neighbour or use the online complaint process I posted a link to.
As an aside, which probably isn't helping, there seems to be a bit of an issue with the forum software at the moment where a notification of new replies only takes you to the last reply. That may be how you missed the original pic of the ONT. So maybe reread the entire thread, making notes of which questions you haven't yet answered.
Another software anomaly is that when you hit "reply" to a post, you aren't really replying directly to that post. So unless you use tags or quotes, no one knows which post you're replying to.
Entirely your option to adopt a "Why should I" approach, but that won't get anything resolved unless a Mod drops in. Your call...
if your phone is connected to the white 5c box then remove the connection and connect your phone to the green socket on back of BT hub and check phone now works - nice simple procedure
The patience shown towards the OP , despite their prevarication is remarkable, it’s almost certainly the case that the OP has not connected their phone to the SH2 ( perhaps they think that was Openreach’s job , but it isn’t ) or ( less likely ) there has been some glitch in the ‘DV’ phone service service being supplied but the OP doesn’t want to either check the router administration pages to confirm this , or contact BT via the customer service number which they admit to have supposedly tried and but failed to negotiate the voice controlled menus , but it does ‘prove’ they have access to a phone service ( possibly a mobile phone ) , and seem unable to navigate ‘menus’ on the customer service number , that presumably thousands of other , every day have no problem with .
PS three YELLOW lights on OP box. Now PON is flashing yellow." END
Afterwards , I went to a local OpenReach depot to seek help but it
had closed for the day.
I think that @Yxull3 is a troll who's taking the you-know-what out of us & I reckon we should all stop indulging him.