I also changed the boot Logo.bin file as @noidremained mentions here: Logo changer
The info on the XDA forum is fairly good but the Logo change program didn’t work for me when creating an update.zip and using TWRP to flash it. So I used SP Flashtools to flash the newly created Logo.bin file and the scatter file for the Rollme S08. That worked fine and I now have a Rolex Stargate version instead of a Rollme 