Not ANY ruu! Only RUU for M7_UL models. CID and MID must match the ruu (can be easily changed to match RUU with s-off)
M7WLS is a different phone and flashing things for the WLS variant on your UL variant WILL brick your phone.
BTW Never flash things to your phone ''under the impression'' it is ok, read carefully and ask questions
---------- Post added at 05:51 PM ---------- Previous post was at 05:43 PM ----------
now you could try the 1.28.401.7 ruu
Be sure the MD5 value match the downloaded RUU: 2fd46305b6080830e2ca27a080999b93
fastboot oem writecid HTC__001
change MID to PN0710000 using this tool
then run the ruu
and stay bootloader unlocked for now
if your issue persist, your phone is hardware damaged and you will need to send it back for repair.
C:\adt-bundle-windows-x86_64-20140321\sdk\platform-tools>fastboot oem writecid H
(bootloader) fail: [writecid] Invalid cid
OKAY [ 0.013s]
finished. total time: 0.014s
EDIT: 2 underscores and not 1 lol.