Phone will not keep a signal after 7.0 Update (LTE, HSPA, or 3G) HELP!!

I'm at my wits end. I did the Nougat update from the Beta last week. On Sunday, I woke up to a "No Service" message. Rebooted the phone and I got service again. Since then I've had service cut out on my every few minutes or so. I can actually watch it happen. I've see a few links where people report having a similar issue, ( Here ) but mine is not just on Nougat now. I wiped and downgraded to MM and am still having the issue. Here is what I've done in the best order I remember if someone can help.

Rebooted the phone.
Removed and reinserted SIM
Deleted newly installed apps
Wiped the cache
Booted into Safe Mode
Checked the APN
Forced a connection directly to T-Mobile
Reset the Network Settings
Flashed the newest 7.0 OTA
Wiped the phone
Unlocked bootloader and downgraded to MM
Used the OTA to upgrade to Nougat again
Wiped and downgraded to MM again
Contacted Huawei for an RMA (a whole other post in and of itself)

This is where I am so far. I have the new 7.0 OTA sitting pretty wanting to be installed, but since this is the most likely suspect to start the issue, I'm not installing it yet.

I've only seen a few reporting this issue. It's enough to know I'm not crazy, but that doesn't fix the issue.

What could have happened to the radio that makes it not work, and what's the issue with it not working on the old software that I know works?

Am I just looking at a phone that was ruined with a software update? Is the crappy RMA service my only hope?

Any help is appreciated.

Thanks.