An untethered jailbreak means the device remains jailbroken after a full power cycle (shutdown and reboot) without needing a computer or app to re-trigger the exploit. The last true untethered jailbreak for any modern iOS version was iOS 9.1 (Pangu 9.1, released March 2016). After iOS 9.2, Apple closed the vulnerabilities that allowed untethered persistence (e.g., by patching launchd and dyld tricks used by Pangu, TaiG, and evad3rs).
The keyword contains a curious "6" – "ios 9.3.6 6 jailbreak untethered." This likely refers to two possibilities: ios 9.3 6 jailbreak untethered
Clarification for SEO: If you own an iPhone 6, you cannot run iOS 9.3.6. You should search for "unc0ver iOS 12" or "Chimera." If you own an iPhone 4s, 9.3.6 is your final OS. An untethered jailbreak means the device remains jailbroken
If you cannot have untethered, what is the best alternative? Two tools dominate the 9.3.6 landscape. Clarification for SEO: If you own an iPhone
Subject: Security Vulnerabilities, Exploitation Methods, and Deployment Mechanisms for Legacy 32-Bit Devices Target Firmware: iOS 9.3.6 Architecture: ARMv7 (32-bit)