Originally Posted by mabaqi View Post
I own a HTC One M7 UL with KitKat 4.4.2 and HTC Sense 6 installed. I installed TWRP 2.7.1 custom recovery on it and after that I turned S-Off and removed the Tempered flag and then locked the bootloader but let custom recovery stay there. Can I turn S-On back with custom recovery installed without bricking my phone.

Stock ROM KitKat 4.4.2 with HTC Sense 6
Stock Boot
Stock Hboot v 1.57
Custom Recovery TWRP 2.7.1
Yes, you can have a custom recovery and S-ON. However, unless you are returning the phone for warranty reasons the consensus is that you should remain S-OFF. It is becoming more difficult to get S-OFF with the higher hboot like you have.