Constantly Loosing Cellular Connection on Spitz x3000

It did upgrade several days ago, the router update that is… However its still having similiar issues… Today again it disconnected after noticing it being extremly low. Went into the router UI and sure enough, the IMEI i had programmed into it was no longer there and instead was what im guessing the original IMEI starting with again a 01 or 10 something like that. Thats what its been doing for sometime now, again i dont understand how it was working beautifuly and then suddenly it starts slowing down and reseting or whatever is causing it to erase the imei i set it too.
So again, i would love to fix this but again, as i mentioned above. I cannot follow the instructions as there is a error, and im still awaiting someone to give me clear guideance on how to get past this obsticle.
As i said before in the previous unanswered post.
Step 4 cannot find the file

PS C:\Windows\system32> C:\Users\USER\Desktop\spitz\RM520NGLAAR03A03M4G_01.201.01.201.zip root@192.168.8.1:/RM520NGLAAR03A03M4G_01.201.01.201.zip
PS C:\Windows\system32> ssh root@192.168.8.1
root@192.168.8.1’s password:

BusyBox v1.33.2 (2024-04-19 07:45:03 UTC) built-in shell (ash)


And i would appreciate whomever else in this thread trying to solve there own issues start there own thread as its making what im asking for more confusing. I canot understand anyone if everyone is saying to do something and everyone is commenting to them what to do instead of myself, or my not knowing who is talking to who…

So again… What do i do to update this as the prior instructrions dont seem to be working. This is so frustrating and going on for months now…
I really appreciate the help, but everyone needs to find there own post and leave my situation to myself. its very confusing…

So How do i get past this and update this?? Links, downloads excat link address and precise instructions please… Its not finding the file as i posted before…