Originally Posted by mikeydubbs
hey so i need to send my nexus s in for repair and i have stock rom and recovery, but every time i try fastboot oem lock it just sits at "waiting for device"
ADB works fine.
I tried alternative drivers
What can i do to re lock my phone?
Hi, I know this thread is old but I was having the same problem relocking my nexus 4 after installing stock Android 4.4.3 KitKat.
I'm using Nexus Root Toolkit, I don't know what tools you're using to lock your nexus S boblem ut this very easy to use it downloads the drivers and what ever you need to lock, unlock or flash stock and custom roms for any Nexus device.
So my problem was that I would launch OEM Lock on Nexus Root Toolkit and it would detect the device, reboot in Fastboot mode and it would proceed just fine but after saying "Launching TWRP.... something" it would reboot the phone and say to me "Waiting for device" untill it would time out.
I found out that when the program(NEXUS ROOT TOOLKIT) asked me to download a TWRP IMG files, I said no everytime because I didn't think I'd need it. So after trying 5 times, I allowed it to download it and i retryed to OEM Lock it and MAGIC!
Somewhere in the process of Locking the rom it is going to need the TWRP File so allowing the program to download it solved it for me.
I don't know if this will help you or if you still have the same phone, but if you do have use Nexus Root Toolkit and download all it asks and you'll be fine.