Starscream122:
Update:
I changed IP Pool Start Address to 192.168.1.5 and then I was able to change the IP address to 192.168.1.2 and then turn DHCP off again.
So the issue was the start pool address conflicting with the modems IP address.. However with DHCP disabled it should not have done that.
Is there a sequence I should be using for the DHCP start Pool even though I am not using DHCP or is 192.168.1.5 fine?
I think any other ip could be ok. I just chose 5 at random.