Originally Posted by jlmancuso
If you are using a sprint l900 then bootloader iS NOT LOCKED. Use a windows pc and cf's auto root and you will be rooted.
Sent from my SPH-L900 using XDA Premium 4 mobile app
There is MUCH Joy.
For others who may need this info: I spent about an hour reading through the XDA forum for CF-Auto-Root.
I then spent about 10 minutes finding and installing Samsung USB Drivers
I then followed the CF Auto Root instructions. It worked. less than a minute later I was rooted.
I then spent 1/2 hour searching for, downloading, installing and configuring the APK for SuperSu 2.1 (manually since CF Auto Root installed version 1.something, which seemed to keep crashing).
For added joy I installed from Google Play WiFi Tether Router (paid app) and 10 minutes later had working Hot Spot.
Thanks for pointing me to the right place - and for the tip about my bootloader.