how i solve the different sim card in iphone 2G and 3g

Q-how i solve the different sim card in iphone 2G and 3g?

A-a very esay simple and safe way for 2G and 3g (not for 3gs and 4g) different sim card..Only flash with 3.13 with Itune ..Jailbreak with redsn0w 9.4 using 3.12 frimware(must )not using 3.0 or 3.1.100% solution..tested..

best regard
bilal zain