Hello all. I'm new to this site and I'm hoping I can find an answer to a question I've been looking for all weekend long. Ok, here's my situation. I have a jailbroken iPhone 4 on 4.3.3. I'm one of the "lucky" ones who's mic no longer works. I thought it might have had something to do with something I downloaded from Cydia so I upgraded to 4.3.4 to kill Cydia. After doing so I made 1 phone call and it worked. But that's the only time it worked. Once I saw this, I used my 4.3.3 shsh to downgrade back to 4.3.3. I'm now about to call my local Apple store to exchange my phone for a working one. Here's my question. If the new phone they give me is on 4.3.4, would the shsh from my current phone allow me downgrade that one or is the shsh only good for the actual device it was saved from?