I have been sifting through the fragmented data that exists on custom recovery and rooting for the G510 and have a couple of questions if you have the time.
Does TWRP (or any other custom recovery) need the bootloader unlocked to work if the phone is already rooted?
I ask this as I have found this tool (http://www.cydiaimpactor.com/) which says it can root the G510 without needing to unlock the bootloader. I found it via XDA and have seen it on youtube a couple of times.
I was wondering as if you can, it means you don't need to unlock the bootloader and "void" your warranty.
Any input would be great, as I am trying to get my head round this.