Download HTC Desire 626s RUU Firmware Files
Android 5.1.1 Lollipop
RUU_A32E_UL_L51_DESIRE_SENSE70_TMOUS_1.23.531.3
Android 6.0.1 Marshmallow OFFICIAL RUU
RUU_A32E_WHL_M60_DESIRE_SENSE70_SPCS_MR_Sprint_WWE_2.27.651.6
HOW TO FLASH HTC DESIRE 626S
Follow the instruction from the RUU program.
Download the HTC Dsire 626s ROM RUU to your PC.
Boot Phone Using vol down key and follow below image.
Connect HTC device to your PC via USB cable.
If the device is not recognized, reinstall drivers and then disconnect and reconnect the device from the USB cable.
Now run the HTC 10 RUU.exe file. This will launch the system update wizard.
Follow all of the system update wizard instructions shown on your PC.
Once the installation is complete, click Finish.
The device will reboot.