[Q] I want to get my phone to get ota updates topic

Hi guys,

To make a long story short, I messed up my phone to a soft brick, revived it, and am now trying to get it back to near normal. I am currently running 6.09.401.12 odex rom by mike1986 on my at&t htc one m7. Question is, is it possible to get an ota update by downgrading my rom to an at&t rom lower than 5.12.502.2? And then get an OTA update? As an aside, on mike's rom (for international htc one) the gps takes a very long time to lock and only shows a blue dot on google maps/no compass mode. Dont know if this has to do with different type of rom or not. So how can I get back to stock while being S-ON? And I accidentally deleted my nandroids while wiping my pc (I know really stupid :P I did not flash a new radio/using stock radio. Here is output of system getvar:

bootloader) version: 0.5
(bootloader) version-bootloader: 1.57.0000
(bootloader) version-baseband: 4M.27.3218.14
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 5.12.502.2
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno:
(bootloader) imei:
(bootloader) meid: 00000000000000
(bootloader) product: m7_ul
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0712000
(bootloader) cidnum: CWS__001
(bootloader) battery-status: good
(bootloader) battery-voltage: 3902mV
(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

Thank you very much :).