Some members of /r/jailbreak mentioned it's possible to update iPhone 5s to iOS 10.3.3 OTA yesteryear modifying SystemVersion.plistto incorporate iOS 7.0.2 information together with erasing the device alongside Cydia Eraser together with thus device volition remember iOS 10.3.3 OTA update itself afterwards. However it turned out the latest Cydia Eraser 0.9.43 restores master copy SystemVersion.plist file together with that method won't work.
There's a means to update OTA (over-the-air) to iOS 10.3.3 whatsoever iPhone 5s running iOS 7, 8, nine version that supports exclusively untethered jailbreak (iOS 7.0, 7.0.2, 7.0.3, 7.0.5, 7.0.6, 7.1, 7.1.1, 7.1.2, 8.0, 8.0.2, 8.1, 8.1.2, 8.1.3, 8.2, 8.3, 8.4, 8.4, 9.0, 9.0.2, 9.1) fifty-fifty if yous don't select SHSH2 blobs for iOS 10.3.3. I've successfully tested this on 5s running iOS 8.1 together with 8.3. You'll demand a virtual machine (freeware VMware Workstation Player for PC or VirtualBox for macOS) or PC alongside Windows (to teach at nowadays ISO link of Windows 10 role Developer Mode of your browser on this page together with laid your browser developer covert resolution to mobile device, i.e. Google Chrome > F12 > iPhone 5). SHSH2 blobs of iOS 10.3.3 are non required together with thus yous tin update without SHSH2 blobs. I tin confirm iOS 10.3.3 is snappier than iOS 8.1 on 5s, g0blin jailbreak for iOS 10.3.3 is coming soon. It seems 5s performs poorly inwards iOS xi together with thus updating to 10.3.3 is by together with large a skilful idea.
You should commencement jailbreak your iPhone 5s that is running legacy iOS. Be certain to take away whatsoever electrical current version of iTunes together with install older iTunes 12.2 (except for evasi0n7 yesteryear spockers since it requires iTunes 12.4.3) for improve tool compatibility. Disable Find My iPhone, Passcode Lock, enable Airplane Mode, brand your 5s trust your estimator together with role the appropriate tool for jailbreaking:
iOS 7.0–7.0.6 evasi0n7 1.0.7 yesteryear spockers (incompatible alongside OTA-updated iOS 7.0.X) or evasi0n7 1.0.2 yesteryear spockers (probably compatible alongside OTA-updated iOS 7.0.X), iTunes 12.4.3 64-bit
iOS 7.1–7.1.2 Pangu 1.2.1.1 [direct link], iTunes 12.2 64-bit
iOS 8.0–8.1 Pangu8 1.2.1.1 [direct link], iTunes 12.2 64-bit
iOS 8.1.2–8.4 PP Assistant 2.5.1 [direct link, guide], iTunes 12.2 64-bit
iOS 9.0–9.1 Pangu9 1.3.2.0 [direct link], iTunes 12.2 64-bit
iOS 8.0–8.1.2 TaiG 1.2.1 [direct link], iTunes 12.2 64-bit
iOS 8.1.3–8.4 TaiG 2.4.5 [direct link] (incompatible alongside virtual machines), iTunes 12.2 64-bit
Note PP Assistant should survive able to jailbreak whatsoever iOS from 7.0 to 9.1 together with is a solid production overall. But yous should strictly follow the guide because programme is inwards Chinese. I recommend yous non to waste materials fourth dimension getting TaiG tool to travel together with role Pangu/PP.
Upon successful jailbreak of your legacy iOS, follow these steps:
Download together with install iFunbox or like PC program
Run Cydia, uncovering together with install Cydia Eraser, Apple File Conduit 2
Connect iPhone 5s to computer, launch iFunbox, uncovering /System/Library/CoreServices/SystemVersion.plist together with re-create it to computer; yous tin also backup legacy iOS blobs – /System/Library/Caches/apticket.der
Edit your SystemVersion.plist re-create alongside Notepad: laid ProductBuildVersion to 11A501, ProductVersion to 7.0.2 (or role untouched iOS 7.0.2 file)
Enable Wi-Fi on your iPhone 5s, create non disconnect it from iFunbox
Here comes the tricky part. Cydia Eraser executes iOS restore inwards ii stages: firstly it compares electrical current soil of every file/folder together with looks what's been modified land organization was jailbroken, secondly it downloads together with places inwards user folder unmodified files/folders from Apple servers, thirdly it replaces modified files/folders alongside originals. The fob is to allow Cydia Eraser consummate scanning of your device together with to manually supersede SystemVersion.plist land Cydia Eraser hasn't finished it's job. You tin select a hold off at how Cydia Eraser works. You should supersede SystemVersion.plist alongside the modified i when the instant condition bar completes 80% (first condition indicator is labeled "downloading mouth of materials", yous should exceed it through). It's recommended that yous commencement opened upwards /System/Library/CoreServices/ inwards iFunbox together with endeavor to re-create together with glue edited SystemVersion.plist inwards this folder together with thus the "Replace or Skip Files" dialog would appear but yous should click "Replace" exclusively when instant bar reaches 80%.
Once iPhone 5s reboots, you'll select to re-activate it alongside SIM carte du jour together with Wi-Fi. At this indicate your device may deed unstable together with blank covert alongside Apple logo together with loading bar may appear unpredictably. If yous succeeded inwards changing iOS version, all icons on the Home Screen volition survive broken, blank loading covert may appear unpredictably. At this indicate yous should opened upwards System Preferences together with confirm your iOS version is 7.0.2.
In representative Software Update dialog won't appear yesteryear itself role System Preferences > General > Software Update to teach iOS 10.3.3 OTA update. If yous failed, Cydia Eraser volition only convey your device to unjailbroken soil together with yous tin endeavor again.
Note It's recommended that yous install tvOS xi Beta Profile together with thus your 5s won't download iOS xi OTA.
TL;DR
1. Jailbreak your electrical current legacy iOS
2. Install Cydia Eraser together with Apple File Conduit 2 from Cydia
3. Copy /System/Library/CoreServices/SystemVersion.plist to PC using iFunbox
4. Edit SystemVersion.plist using Notepad: ProductBuildVersion – 11A501, ProductVersion – 7.0.2
5. Enable 5s Wi-Fi, travel out along 5s connected to PC together with /System/Library/CoreServices/ folder opened upwards inwards iFunbox
6. Start copying modified SystemVersion.plist from PC to /System/Library/CoreServices/ but don't confirm replacing master copy yet
7. Run Cydia Eraser together with confirm replacing of SystemVersion.plist when instant loading bar of Cydia Eraser passes 80%
8. Check for Software Update i time 5s reboots
Source: reddit
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