I’d successfully downgraded my factory unlocked iPhone 3GS from firmware 3.1 to 3.0 with baseband version 05.11.07. But, my Singtel sim card somehow does not have any network coverage.
iTunes 9 successfully restored my iPhone 3GS to firmware 3.0 but with error 1015 and iPhone is showing iTunes with USB cable. Then, I jailbreak it with redsn0w 0.8 and everything is working fine except it doesn’t detect my Singtel sim card. Currently, I’m still trying to work out on this and hopefully I can to find the solution to fix it.
P/S: I’ve fixed the sim card issue, here’s the solution.
