Which version of Heimdall to use with S2 or S3?
I never did find out which version of Heimdall to use with either device, but settled on using ODIN3 v1.85 with my S2 (didn't work with an S3, after all).

If you have the AT&amp;T Skyrocket version of the S2, a great place to start looking is: [HOWTO] THE ULTIMATE NEWB GUIDE > | INSTALL CWM/TWRP | ROOT | UNROOT |the SKYROCKET