Hello.. I'd like to get started at iOS Exploiting. I'm reading Mac OS X and iOS Internals to the Apple's Core 1st edition book to get into exploiting. I'm still at the beginning, and as far as I read, I know that I'll need a jailbroken device to test out book's examples. I got 3 devices, an iPhone 4s on iOS 9.3, a 5s on iOS 9.3.2 and an iPad 3rd gen on iOS 9.0.2. Only iPad is jailbreakable. The book though being the 1st edition, was written during 2011-2012, mostly talking about iOS 5 and sometimes quoting the 6 (which had to still come out during its writing). To follow book's examples should I buy an old device like 3gs on iOS 5/6 or my iPad'd be fine? I'd like to learn exploiting and be able to find some times some nice exploits in iOS 9/10... Also I saw that this book is getting upgraded to 2nd edition, though I'd like to learn the basics of the 1st and try them in 1st person.