Yeah, I bought one that the bootloader was unlocked as well. Now I noticed I can't use google pay for security reasons. It took me days to setup my phone exactly the way I wanted. I was thinking how great of a phone it was last night. Today I noticed I can't use google pay and if I relocked the bootloader I'd have to reset the phone in the process and wipe all my data. I found a website explaining how to relock it.... https://www.wikihow.com/Lock-the-Bootloader-on-Android#:~:text=Many%20manufacturers%20and%20mobile%2....
Its for android phones in general, don't know if it would work on the ZF9. There's no real documentation guide I can find referring to the how the ZF9 is relocked. I didn't check in depth. It be great if it was just a option to choose and select instead of a procedure. I got the phone 40% off RRP in cost and it was in real new condition. I don't know why people would unlock or change the ROM if that what they are doing to these phones.
