Please follow the procedure outlined below to restore or backup your existing Rom
The procedure to restore or backup your roms is very simple. After rooting your HTC Evo 4G, you may want to backup your newly rooted ROM if you are planning to play around or apply some new tips and trick or hacks on a new overclocked kernel or install new ROMs.
1: Simply get to clockworkmod Recovery by taking phone's battery out (or disabling fast boot) and holding down Volume Down and Power button or you can also get into it using the free ROM Manager app.
2: In ClockworkMod Recovery, you can use the backup and restore feature to backup and restore your ROMs. This will backup all your apps, contacts, settings, the ROM, and the kernel.
By Haseeb Raza