I have a stock 4.3 android unlocked. I want to wipe my phone completely and install fresh copy of the latest software.
I can check what model I have for you if you tell me how to find numbers you seek
Maybe insted of RUU I should ask how to flash ans whipe out my phone with stock software ??
With the phone turned off hold the volume down button and power button for a time (the capacitive buttons at the bottom should flash 13 times), the phone should vibrate, release the power button and continue to hold the volume button. This will take you to the bootloader screen. At the top it could say "tampered" or (its been so long since I have seen a factory bootloader I don't know what it should say). The next line down should read your model number or version such as"M7-UL" put ship S-On or something similiar. What ever the second line down from the top starts with should be your model . To reboot the phone from bootloader, use volume up and down buttons to find "reboot" and tap power button.
Have you gone to settings/ back up ,restore section and did a factory restore? This will wipe the phone completely of all data and return to factory state. This step should return you to an out of the box brand new 4.3 android
5.5 htc sense
3.62.401.1 software number
If you have data on the phone that you want to keep you should go to the play store and download something such as Titanium back up and back up all your sd card then restor data from that. If your not concerned about loosing data dont' bother.