I'll try and look up the 4g settings.
The reason I believe that 4G might not work without a 4g donor is because the WiMaxx system needs to have some form of authentication system to keep off un-paying customers who might try and mooch off their networks. 4G phones have a separate ESN code for their 4G radios. I've checked mine and it has a separate ESN for the 4G radio. You might be able to use the the one your target phone has, but don't hold your breath.
EDIT: Can't seem to find that info. Either the phone is using the connection info from the 3G radio (when it comes to DNS/IP) or I don't know the correct hidden menu to access it. Your hidden menu code doesn't work on my device. I tried ##Debug# and ##DATA#, but those seem to only go so far as to provide the IP for the 4G and not gateway and DNS. IP is always dynamically assigned to you, so manually setting that one is probably not a good idea.
Also under WiMaxx in the DATA hidden menu it has a NAI setting which appears to be the account name for the 4G on for the phone. It is the same as the 4G ESN but with the sprintpcs URL added on to the end just like with a 3G data NAM setting. Thus supporting the idea that you need a 4G donor phone to provide that info.
If your nexas was on Sprint originally, the only thing you really need to change is the NAI (the identity to your 4G radio) since Boost and Sprint uses the same towers for the 4G and thus the DNS and IPs will be the same or at the least compatible between the two. I've used IP settings from my sister's Sprint 3g phone before back when I had my prevail. They were both interchangeable and some even matched.
I recall seeing entries for M.I.Ps accounts in a EPST hidden menu. Is that the separate account info for the 4G? I can take another look at those.
EDIT: Here's some screenshots of my M.I.P settings screen (I recall the Prevail did not have a M.I.Ps because it was blank when I looked at it in QPST. So I think M.I.P is used by the 4G radio)
(click to enlarge)
(in bottom screen shot "Home Address" is always 0.0.0.0. It's shown like that on my other phones I've had and on this one. DO NOT attempt to program it to a custom IP. I tried that. Got connection problems on reboot. So leave that one alone.
)
I censored out my unique account info, but indicated what areas are different for 4G. It appears to use the same IP information as the 3G radio. Device NAI for the 4G radio is unique and not the same as the ESN used on the NAI for the 3G radio.
There are two strings here that identify you to the network. One is the device NAI which tells the network what device you are using (sorta like a MAC address) so that the carrier knows whether or not that device is valid and supposed to be on the network and whether or not that ESN is in service.
Then there's the account NAI which is shared by both the 4G radio and 3G radio. (for Boost/Sprint anyway) That identifies the customer account the above device ESN is attached to. Both will probably need to match (aka device ESN for 4G radio must be on file in your account, thus you must activate a 4G phone on your boost mobile account and use that ESN that you activated with Boost to recognize it) for the network to accept that connection.
So I'm double sure you NEED to have a 4G donor phone. The only donor phone available for Boost is of coarse the Evo Design.
I'm vaguely familier with Clear-wire. They probably lease service from the 4G towers. But they are NOT the same as the 4G used by Boost/Sprint. They might use the same towers but they likely use different servers and different IPs to route data connections through. Same goes for account information. It's like saying that you have a phone that connects to a 3G tower for AT&T and then based solely on that, you can simply move that phone to a 3G tower used by for example Sprint without ever registering the account information for that phone on the other carrier. Any account you create on ClearWire is SEPARATE from that of Boost Mobile or Sprint since they do NOT share that info.
(in my analogy, we shall pretend that "roaming" doesn't exist, that and if roaming does exist for 4G phones, it is most certainly not available on Boost because they don't even allow roaming at all on their phones.)
EDIT (again): I've pulled the battery and looked at the sticker that has my ESN info. The WiMaxx radio does indeed have it's own unique ESN from that of the ESN from the ESN used for the CDMA/GSM side of the phone.
