After work was done in the area, signal drops randomly or after reboot

But my friends htc m7 on stock/same network has absolutely no problems whatsoever. I've tried flashing firmware, radios, different roms, nothing has helped. When I do get a signal, it's for a few hours or until I reboot, whichever comes first. Any ideas where to look next?

(bootloader) version: 0.5
(bootloader) version-bootloader: 1.54.0000
(bootloader) version-baseband: 4T.36.3218.06
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 6.04.1700.13
(bootloader) version-misc: PVT SHIP S-OFF
(bootloader) serialno: ****
(bootloader) imei: ****
(bootloader) meid: 00000000000000
(bootloader) product: m7_ul
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0710000
(bootloader) cidnum: 11111111
(bootloader) battery-status: good
(bootloader) battery-voltage: 4023mV
(bootloader) partition-layout: Generic
(bootloader) security: off
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-0ddc65a3
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0


Thanks for looking

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