I used 1.1.1, 04.01.13. The S/N: 7R737***. I'd like to upgrade it to 1.1.3 and restored it with itunes selecting the 1.1.3.ipsw. It upgraded the modem firmware to 04.03.13. Now I'm having problem that I can't restore it to any firmware. I'm thinking to restore it back to the original so I can re-do it all over again. But, I don't know how since my phone only shows the iTunes icon and the USB cable.

Please help..!!