[carlitos]

Originally Posted by leerage

This makes a copy of your unique 4G RSA Key. Without it, you wouldn't be able to access 4G. If you have HBOOT 2.02/2.10, I hope you used:

[ROOT][GUIDE] HBoot 2.02/2.10 SOFF - The Savior Edition - Upd. 12.26.10 - xda-developers

As methods like Unrevoked aren't coded for the other partitions (that contain your 4G RSA key) and will ruin 4G permanently for you on that Evo.

ok it back up your rsa key. but for what? why do u need. in what case are you gonna need it. do u have to restore it back someday ??? idk some explanation please if im not asking too much..