iPhone 4s – Downgrade iOS 9.3.5 to iOS 6.1.3 After Phoenix Jailbreak - 3uTools
How to downgrade iPhone 4S / iPad 2 to iOS 6.1.3 - iFixit Repair Guide
How to downgrade iOS on an iPhone without a computer - Quora
Download iOS 9.3.6, iOS 10.3.4 IPSW Links And OTA For iPhone 5, 4s, iPad 4, iPad 3, iPad mini, More | Redmond Pie
How to downgrade iPhone 4S / iPad 2 to iOS 6.1.3 - iFixit Repair Guide
Downgrading iOS 9.3.5 to iOS 6
iPhone 4s - Wikipedia
How to Downgrade from iOS 9 Back to iOS 8.4.1 | OSXDaily
How to Downgrade iPhone 4s From iOS 9.3.5 to iOS 8.4.1 / iOS 6.1.3 (Without SHSH Blobs) – iPodHacks142
Bypassed iPhone 4s iOS 9.3.6 with working Appstore. No Data sync (photos, notes, ect) FindMy, jailbreak (unable to install 3rd party apps from JB websites bc no activation), ect. Done using cheap
iOS 9.3.5 Security Update Released for iPhone, iPad [IPSW Downloads] | OSXDaily