Hi, I had a 32GB iPhone 3GS that was jailbroken. It had SHSHs backed up for 3.1.2 and 3.1.3 on Cydia, and was running the older baseband (the one before 05.12.01). It had hardware issues, so Apple replaced it. My replacement phone is running stock 3.1.3 firmware with 05.12.01 baseband. However, the model number is MB717LL. That's the old bootrom, right? Anyway, my question is, can I jailbreak again? Are my backed up SHSH's device-specific? Or should I wait for the Spirit jailbreak? Thanks so much.