Thanks a lot. Battery drain is the worst, but seriously, this has been horrible since forever. It's the heat that makes it this bad.
But theoretically; if I want to download to iOS 18. Could I download just the latest beta from ipsw? It do i have to download the first beta and then upgrade further?
What makes it confusing in this beta cycle that there are two beta versions available at the same time:
1) iOS 18.0 beta, currently in DB7/PB5, which is quite mature and should be released to the public in September;
2) iOS 18.1 beta, currently only in DB2, which contains early AI elements and which you are currently running. This beta has less frequent releases than iOS 18.0, as it would probably be released to the public in October. The next beta of iOS 18.1 can come as early as today and, if not, most certainly next week. We could also expect it to contain most of the fixes already contained in the latest iOS 18.0 beta.
Back to your question. Rolling back to a previous iOS is relatively simple if you have made a proper backup before installing your beta. If you were running iOS 17.6.1 before installing iOS 18.1 beta and made an archived backup on your Mac/PC, you can then
restore your iPhone. This will wipe your iPhone clean and install the latest official iOS release (17.6.1) on it. You can then put everything back from your backup, so you will have 17.6.1 running on it and then install the latest iOS 18.0 (
not 18.1!) beta.
If you do not have the archived iOS 17 backup, things get more complicated, as your iOS 17 iCloud backup has probably been overwritten by iOS 18.1 by now. If this is the case, I would leave it as it is and hope that the next iOS 18.1 beta sorts out most of your bugs.
PS If you want to go IPSW route, you will also need to download and install the latest X-code beta from Apple’s developers website. If you do not want to install the whole thing, you can just run MobileDevices.pkg utility contained in it, otherwise your IPSW file will not work.