iPhone 4S iOS 8.4.1 vs iOS 9.3 Final Version Speed Comparison Build 13E233 and 13E237 - YouTube
iOS 8.4.1 Update Available to Download for iPhone, iPad, iPod touch [IPSW Links] | OSXDaily
Apple iPhone 4s Black (Verizon) A1387 16GB Very Good Used (GSM CDMA) IOS 8.4 | eBay
fluff] My two iphone 5's one on iOS 8.4.1 via downgrade and the other on iOS 6.1.2 via coolbooter (if you know any better method dm me) : r/LegacyJailbreak
Download iOS 8.4.1 Final For iPhone, iPad, iPod touch [IPSW Links] | Redmond Pie
iOS 9 VS iOS 8.4.1 Speed Test on iPhone 6, 5S, 5 & 4S - Is iOS 9 Faster? - YouTube