[EVO 4G Android Development] JustinChase:
Has anyone determined for sure if this is a ROM/rooted/Modified phone problem, or is this a Sprint/HTC problem?

I don't have a non-rooted phone to test with. I'm currently backing up and will nandroid next, then I'm going to play around/test some things to see how mine reacts.

I honestly don't really ever turn on 4g, as I don't get signal at the office, don't bother at lunch, and have wifi in the house.

I am returning mine tomorrow for the separation problem, I can see more light from below the home button along the frame than the home button gives off, and can see it under the next 2 buttons also.

Anyway, I'm going to get it back to "stock" before the morning, so I'll see what I can find out, if anything.

I'm done with the backup now.

I am connected to wifi, I just turned on 4G. 30 seconds later it's connecting, then obtaining IP address for a couple of minutes, and it never got one.

I disconnected wifi, then turned 4G on again, same thing, scanning, connecting, obtaining IP... but never gets one (at least for the couple minutes I waited).

I never had a jacked up MAC, I rooted before the 2nd OTA was released, I didn't install anything for about a week after, watched all the problems get worked out, did all the steps in post 2, seemed to work fine, have been running 3.2.3 since then. I get a few weird FC's every now and again, nothing too weird or common.

I've never flashed any of the kernels.

I get the same results on another phone, unlocked with toast 1&2, flashed right to 1.47 with whitslack's method, restored ti backup, flashed 3.2.3, works fine, other than the 4G issue above.

I rebooted both phones. wifi was off when i rebooted, 4G will connect as normal, quickly. if I turn off 4G, then turn it back on, it still connects fine.

if I turn off 4G, turn on wifi, get an IP, turn off wifi, turn on 4G, it connects fine.

if I turn off 4G, turn on wifi, get an IP, turn on 4G, it will connect, then instantly disconnect, then remain on disconnected.

If I turn off 4G, turn off wifi, turn on 4G, it will connect just fine.

this behavior is exactly the same on both phones.

I did not do anything else during the above steps, and I was able to "break" 4G (disconnects if wifi is already connected). This is actually correct, as there is no point to using 4G if you have wifi, so they don't allow them to be on at the same time.

However, this has not resulted in the error/problem I was getting before, and that MANY others have reported, endless obtaining IP address.

so, something after a restart, and the testing above must break 4G functionality.

This leads to a few questions. Do those that report a fully functional 4G really have it all the time, before and after wifi usage and running for some time??

I seem to have it working now, but 20 minutes ago, it wasn't.

Next, is this a rooted phone problem, or a software/driver problem from HTC/Sprint?

Is this a problem with the PRI being the old version if rooted?

I remember someone (Whitslack?) talking about the PRI being part of the radio (I think) and that it could probably be extracted, but didn't see any reason to bother with it at the time. Might this be the reason to try that?

I will play around a bit more but, I thought I'd report that and see what others thought about it, or had known solutions.