3.1.3

HI everyone. i require your help in jailbreaking my iphone. currently i have 3.1.3 version running and in my computer i only have 3.0.0 firmware's ispw(iphone_1,2_3.0_7A341_Restore.ispw) my quesn is - can i use blacksnOw to jailbreak my iphone with 3.0.0 firmware? also i have downloaded...

hey guys my friend who'z in Australia came to india and unlocked his iphone and waz using indian sim but recently he upgraded his phone software to 3.1.3 now he is not able to use other sims ,, So guys any one here to help how to unlock the mobile ? dunno is it legit to ask , sorry if its not ...