You can root the device and block future updates until such time when you do want to try the update(s). And you can also create a cwm/nandroid backup, and if the device should get "accidentally" updated, you can restore the backup to revert.I love the android OS, but it seems to me that about a year after I've owned any android phone an OS update comes out that basically kills my phone. The way I see it, I'm only 6-8 months away from the S4 getting screwed by an OS update. Hopefully others dont have this issue, but it has happened to both my wife and I with every phone over the last 4-5 years.
I have a 2012 Google Nexus 7 tablet still running Android 4.1.2, because I didn't want Android 4.2 or 4.3 on it.
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