Click on the ad first then go back to the page and enter the verification code and then click the blue button on the right of the orange one
How to install OTA
If s off and super cid don't lock your boot loader again leave it unlocked
Make sure your device is unrooted and matching cid.
Make sure all missing apps that was lost when unlocking bootloader is there in /data/preload/apps.
Make sure u have stock recovery and reboot to it and if u r doing it manually all u have to do is rename ota to update.zip and go to stock recovery then hold power and double press vol up for options then go to install from ext sd card and navigate to the file and make sure u put it on the root of the ext sd card.
How to install firmware
Extract firmware file from Ota and put it to the root of the ext sd card and rename it to PL99IMG.zip then reboot to boot loader when ur there use power key to select bootloader and the file will load just follow instructions and u will be updated.
Option two is that u can use a pc using fastboot type fastboot oem rebootRUU then when it's loaded type fastboot flash zip firmware.zip it will install if it says flush again repeat the fastboot flash zip firmware.zip. when ur done type fastboot reboot-bootloader to check if your firmware is updated
Sent from my HTC Butterfly using xda premium