First of all i must say that i did make a good search but still didnt solve my problem .

I have one 1.1.1 ad one 1.1.2 Iphone upgraded to version 1.1.3 and baseband 04.03.13 accidentally

I tried downgrading and jailbreaking but the mosst that i done was Ipod and phone working but no Network

In the 1.1.2 version upgraded i faced > Main Script executionfailed error in downgrading baseband to 04.01.13

Any good and true procedure to make these phones working back again??

Thanks in advance

WBR

It is a very well known fact that 1.1.2 OTB phones can not have their baseband downgraded, so don't tell me you searched and found nothing because that is not the case. You will need to use the hardware bootloader downgrade method to get the 3.9 bootloader first. The 1.1.1 OTB (i'm assuming you're giving me OTB versions) should have absolutely no problem with the downgrade assuming you're following the guide correctly.