Hi @rainman287
Ok, there's quite a lot going on here, my gut feeling is that you are picking up a 5G Signal Layer, but your Device(s) are not actually connecting to the 5G Signal but lets go through all the info and try and filter it all.
First off, Ive done a short Hit List of some of the more common reasons why you cannot connect to a 5G Signal in a 5G Coverage Area using a 5G Device. If you could quickly run and check through the List, some are fairly straight forward, others are not or a bit more complex or Techy -
From a Network / Accounts point of view -
The Contract Plan is not a 5G Plan
The Plan is 5G, but the Plan has been configured incorrectly on the System
The Sim Card is extremely old and needs replacing
You have exceeded the Plans Monthly Data Allowance
You have exceeded the Plans Data Fair Use Policy (e.g., Unlimited Data FUP)
You have exceeded your Data Allowance and are running EEs Reserve or Stay Connected Data.
From a Network / Device Technical point of view -
The Device APN Settings are wrong
The Device 2G,3G,4G and or 4/5G Network Settings are wrong
The Device 5G NSA / SA Network Settings are wrong
The Device does not support the NR (5G) Band(s) that its currently connected to
The Device Battery or Power Saver has switched off 5G (some Mobiles and Portable 5G Routers)
The Device is not currently downloading sufficient Data to connect to the 5G Signal layer
The Devices 4G and or 5G Signal Quality is too low for the 5G to Connect (Same Mast)
The Device is connected to a 4G Mast and the 5G Signal is from another Mast (5G Signal Quality)
The Device is connected to a 4G Mast that is not ENDC Enabled or ENDC is configured incorrectly
The 5G Local Network Area Installation is fairly new and has yet to go End User Live
Looking at the first few options above and looking at your Sim, it appears to be showing as a BT Mobile Sim?, if it is, what's the story here? is it ex BT Personal or Business or still a current BT Plan or moved over to EE, you also mentioned about copying the APN Settings from the old Router, again are these BT APN's or EE?, what are your APN Settings you are using.
Using your S10 5G as a Test Phone, are you using the same Sim, if you have more SIMs / Plans which Plans are they on.
You mentioned the Site you are logged onto a Site in NN8 1LD, this is correct, its Cell ID 5198592 Sector 0 firing North, which also confirms as you location is North of this Mast and very close, both the Huawei and the Zyxel were logged onto this Site (same Sector) the Huawei is showing excellent Signal Quality from this Site (4G RSRP -85dbm, RSSI -53dbm and SINR 14db) but looks like no actual 5G Connection even though the Router is showing a good 5G 5 Bar Signal Layer, the Zyxel, nots so good, in fact extremely poor by comparison, again same Sector but showing as 4G+ with Carrier Aggregation on 1800Mhz + 2100mhz + 1800mhz (4G RSRP -116dbm, RSSI -104dbm) but again no 5G Connection and showing a poor 1 Bar 5G Signal. you mentioned the Zyxel was a poor performer, looking at the massive difference on the Signal Level Quality, its almost as though the Zyxel Router could be faulty, but my thoughts are on the Rear of the Router there is an Internal / External Antenna Switch which may have been set to External which could explain the poor Signal Quality as you are not using External Antennas, did you check the Switch Settings?
Just to clarify a point you made about only picking up 4G but living in a 5G Area, the way the 5G Network current works, is the 5G tech bit hangs off the back of existing 4G Infrastructure, this is called 5G Non Stand Alone (NSA), so under this mode its more of a 4G+5G, in other words you need to be connected to 4G (a fairly decent connection) in order to benefit and get the extra 5G Tech, as 5G progresses in the Future the Networks will change over the 5G Stand Alone (SA) without the need for a 4G Connection and this is when we will see greater improvement to 5G overall as a Stand Alone Network.
Looking at your Pics, 1, 2, 3 and 4. Picture 2 (Huawei), and 3 (Zyxel) and 4 (Huawei) all show you are picking up a 5G Signal Layer (this does not necessarily mean an actual 5G Connection), on Pic 1, the Huawei Optimisation Results (What I call the Walkabout Test), you are correct in mentioning there is no 5G Signal, this is a good indication that you are probably not connected to 5G, there are some Backdoor APi Commands you can do on Huawei Routers that will give you a pretty Bullet Proof way of seeing an actual 5G Connection State, but we'll leave that for now as from the information you have provided and my knowledge of these CPE Devices Im 99% certain that your issue is your picking up a 5G Signal Layer but not actually connecting 5G as mentioned from the offset.
There is another possibility but I'm going to rule out for now, and that is 5G Frequency Bands, the Huawei 372 will only only pick UK 5G Band n78, where as the Zyxel will pick up n78 plus some others that EE use for 5G, but as said put that to one side for now as the Huawei is showing 5G Signal Info.
Have a look at the Hit List, by all means do some more Tests and report back any findings, otherwise we can do some more in depth Testing and go from there.
Chris.
MikeT
