how to check bootrom??
 

how to check my phone have (new bootrom) or (old bootrom)

br
sanju..

Put your iPhone into DFU mode.

Then go to Start -> Control Panel -> System -> Hardware -> Device Manager on your computer.

Look for 'Universal Serial Bus (USB) Controller', you'll find
Apple Mobile Device USB Driver as a subitem there.

Right Click -choose Properties, go to Details tab, select
Device Instance Path from the dropdown box. At the end of this info string you will find the bootrom version, e.g. iBoot-359.x