Procedure to Update HTC Thunderbolt with the Official 2.11.605.19 Firmware:
- First up, you need to Download the HTC Thunderbolt Firmware Package (Alternate Link) from here to your computer and then connect your phone to the computer with the help of USB cable and then copy place this file in your device’s SD Card.
- Ensure that you are not placing the file deep into the device or else there is a probability that the device may not detect the file.
- Once you have successfully placed the file, disconnect the phone and turn off the phone so that it can be then entered in the recovery mode. The recovery mode in htc Thunderbolt 4G can be entered by pressing the Volume Down button + Power Button till you see the recovery mode screen on your phone.
- Once the recovery mode is entered, you will see that the firmware update will automatically be detected and the process of update will be started. Just in case if the device doesn’t detect, then you need to select “install zip from sd card” > “choose zip from sd card” and then choose firmware package which you have placed in the phone.
- Now, in the recovery mode itself, select Wipe data/factory reset and also you need to select Wipe Cache partition and then reboot your device by selecting reboot system now with the help of Volume rocker keys.
Tip: Due to some reasons if the update process gets failed or interrupted, then you need to apply the update again by following the steps again from the start. Don’t forget to restore the backup which you have taken in the initial steps.
Congratulations, you have now successfully applied the update of 2.11.605.19 in your HTC Thunderbolt 4G device. Do let us know in the comments section below just in case if you face any issues as we will try our level best to sort out the same.


