Preflash validation failed (OTA Doesn´t Work)

[killerBRs]

Hello . A while ago , I did downgrade the lollipop to kitkat , but gave warning " Preflash validation failed"

I continued , I can use the ROM normally ..
But because of that , I can not update over the air(OTA to lollipop 5.1)

I need help because I can not find the firmware
If XT1039 Retail BR Lollipop 5.1

: /

 

[90Ninety9]

OTA Upgrade

Hello . A while ago , I did downgrade the lollipop to kitkat , but gave warning " Preflash validation failed"

I continued , I can use the ROM normally ..
But because of that , I can not update over the air(OTA to lollipop 5.1)

I need help because I can not find the firmware
If XT1039 Retail BR Lollipop 5.1

: /

Have you upgraded to lollipop historically? Or is this the First Upgrade ?

I have not been able to upgrade my XT 1039 , I suspect is due to the bootloader being unlocked . According to Motorola the Upgrade will fail if bootloader is unlocked , see here

https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/91996

 

[ATTACK]

Have you upgraded to lollipop historically? Or is this the First Upgrade ?

I have not been able to upgrade my XT 1039 , I suspect is due to the bootloader being unlocked . According to Motorola the Upgrade will fail if bootloader is unlocked , see here

https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/91996

Having an unlocked bootloader, doesn't prevent you from upgrading via OTA.

But an OTA will fail to install of you modified your system in any way, like removing bloat, installing xposed framework, etc.

Sent from my XT1031

 

[killerBRs]

I formated , erased all , clean installed 4.4.4 LTE BRAZIL RETAIL Stock ROM, And do a clean data/cache ..

Ota works, but Calls don't work
"Please disable airplane mode"

Normal mode.. Airplane is OFF!
._.
Updated to Lollipop v.23.21.35.peregrine_retail.retbr.en.BR

Calls in same probkem
I see contacts in SIM
But Signal don't work

No root. Stuck ROM...
And bootloader UNLOCKED..
Imei is 00
And SV is 00 :/

 

[90Ninety9]

I flashed stock rom Kitkat and immediately tried the OTA update ( OS left untouched ) , which starts then failed every time .

I posted about this elsewhere and was told this was likely due to the bootloader being unlocked