[Q] Really bad brick maybe topic

Okay, so I'll give as much detail as possible.

Bought broken sprint phone, replaced the body. No issues there. I was trying to clean it up, flash a nice rom for my mom and make it work well. Well, I ended up clearing the OS, system, everything.

What I do have is access to fastboot. No recovery. I've tried a lot of RUUs, but I either get either Error 152, or it hangs on sending at 4%.

Any ideas?

C:\fastboot>fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 1.57.0000
(bootloader) version-baseband: 1.01.20.0515
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 5.03.651.3
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: FA36SS906146
(bootloader) imei: 990001469442651
(bootloader) meid: 99000146944265
(bootloader) product: m7_wls
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0720000
(bootloader) cidnum: SPCS_001
(bootloader) battery-status: good
(bootloader) battery-voltage: 3799mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-1f512bb6
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.054s

Cheers