How may I access the DHCP settings? Want to make printer a FIXED IP

Great that it has worked out. I do NOT know 100% that the DHCP scope starts at 101 but the behavior I observed strongly suggest this to be the case. 

I have seen other users reporting using their own "router" with the T-Mobile GW. It is possible but of course you have to put your unit in to bridge mode or AP mode and disable the DHCP server. Then you could use your own wireless router. Of course I suspect then you would miss some of the features it would normally provide when it is in its native state. Some users used their own wireless router to offload work from the Nokia. Some users reported heat related issues with the Nokia and the theory is unloading processing from the Nokia helps. I have not seen any heat issues with mine so adding another wireless device and spending more money was not necessary. The 802.1ax capability of the Nokia seems to be fine. I have no 802.1ax clients to exercise it so not a big deal to me. I get good performance from my Nokia GW so I don't bother trying to fix what is not broken.