My sister is getting my 5s and it is running the PB, and I need it back on 8.4 to restore her backup. Currently I tried putting it into recovery mode and having iTunes Dl the software, tried this multiple times on my MBA and now tried on a desktop PC, but each time the iPhone turns on and thus gets out of recovery mode, completely on its own, before iTunes is done with the process. Right now it's supposedly extracting the software, but the iPhone isn't even in recovery mode anymore. What do I do? Should I DL 8.4 from online? Also, her backup is on 8.4, will I be able to restore that backup if the iPhone is on 8.4.1, or will I need to DL 8.4?