The iPhone 4s has a specific hardware vulnerability that allows tools to bypass the activation mechanism by modifying the device's "Non-Volatile Random Access Memory" (NVRAM) or by utilizing specialized hardware dongles.
The Process (General Overview):
iOS 9.3.5 was released in August 2016. It patched the infamous “Trident” exploit chain (used by the NSO Group’s Pegasus spyware). But here’s the key: Apple stopped signing iOS 9.x for the iPhone 4s in 2018.
The iPhone 4s has a unique flaw: It relies on a 24-bit hardware identifier for certain legacy checks. Modern iPhones use 64-bit architecture and robust cryptographic checks. The 4s? It’s a 32-bit dinosaur.
When Apple’s Activation Lock server talks to an iPhone 4s, it performs a different handshake than it does with an iPhone 12. Over the years, security researchers found that by intercepting and modifying this handshake—specifically the Certificate Validation step—you could inject a null response.
Cause: Apple deprecated TLS 1.0 on their activation servers. iOS 9.3.5 uses older ciphers.
Fix: Use the DNS method's proxy server that downgrades the SSL handshake.
After bypassing, immediately:
Result Quality: 8/10. Notifications work, but you cannot restore from backup or use iCloud sync.
For the iPhone 4s on iOS 9.3.5, the "extra quality" bypass described above is the best possible outcome without Apple’s blessing. You will have a functional 32-bit iOS device that can play music, take photos, run older games (like Infinity Blade), and serve as a distraction-free writing device or audio player.
Realistic expectations: You will never get iMessage, FaceTime, or push notifications working perfectly. The App Store may refuse to connect. But for offline legacy use, it is 95% perfect.
Final verdict: If you need a reliable daily driver, recycle the 4s. If you want a nostalgic time capsule with full hardware access, the Phoenix + Setup.app rename method remains the "extra quality" king in 2025.
Disclaimer: This article is for informational purposes only. The author is not responsible for data loss, bricked devices, or legal consequences. Always backup your SHSH blobs before modifying system files.
Bypassing the Activation Lock on an iPhone 4s running iOS 9.3.5 is technically possible through various exploits, though most unauthorized methods are tethered or limit the device's full functionality. Legitimate Removal Methods
The only permanent and officially supported way to remove Activation Lock is through the official Apple Support portal or the original owner.
Owner Credentials: Sign in with the original Apple ID and password on the device or remotely via the iCloud Find My page by selecting "Remove from Account".
Proof of Purchase: If you are the original owner but lost access to your account, you can start an Activation Lock support request with Apple if you have the original sales receipt. Third-Party Bypass Methods
For legacy devices like the iPhone 4s (A5 chip), several unofficial tools exist. Note that these methods often disable cellular services, turning the device into a "Wi-Fi only" iPod.
Bypassing the Activation Lock on an iPhone 4s running iOS 9.3.5 is technically challenging because Apple's security link is tied to the device's hardware serial number. While several unofficial methods exist, they often come with significant limitations, such as losing cellular signal or having the lock return after a restart. Official Methods (Recommended)
The most reliable and permanent way to remove the lock is through official channels:
iCloud.com: If you have the Apple ID credentials, or can contact the previous owner, they can remotely remove the device by signing into the Find My iPhone tool on iCloud and selecting Remove from Account.
Apple Support: If you have the original proof of purchase (invoice), you can start an official Activation Lock support request to have Apple unlock the device for you. Unofficial Bypass Options
If official routes are unavailable, these community-identified methods may provide limited access:
DNS Bypass (Limited Access):This method allows you to use a "pseudo-interface" with apps like YouTube and maps without actually bypassing the lock for the whole phone. Go to Wi-Fi Settings on the activation screen.
Tap the 'i' icon next to your network and select Configure DNS.
Enter one of the following IP addresses based on your region: USA: 104.154.51.7 Europe: 104.155.28.90 Asia: 104.155.220.58 Tap Back and then Activation Help.
Arduino with Checkm8-A5 (Hardware Required):For a more "complete" bypass, some users utilize an Arduino board and a USB Host Shield to execute the checkm8-a5 exploit.
Pros: Can lead to a "tethered" bypass where you can see the home screen.
Cons: Requires hardware, will likely result in no cellular signal, and may require re-running the process if the phone restarts.
Software Tools:Tools like iRemove Tools claim to offer a free "tethered" bypass for iPhone 4s on Windows, though this typically leaves the device in a state where it cannot make calls.
Warning: Be cautious of "extra quality" paid tools found in YouTube descriptions or forums. Many are unreliable or contain malware. Official Apple support is the only way to permanently and fully restore the device's functionality.
Bypassing the Activation Lock on an iPhone 4S running iOS 9.3.5 is technically challenging because Apple has patched most simple software glitches. While some tools claim "extra quality" results, many are unreliable or potential scams. iphone 4s activation lock bypass ios 935 extra quality
The following sections outline legitimate methods and known technical workarounds. Official Removal Methods
The most reliable way to remove Activation Lock is through official Apple channels.
Original Credentials: Sign in with the Apple ID and password originally used to set up the device.
Previous Owner: If you bought the phone secondhand, ask the previous owner to remove the device from their account via iCloud Find My.
Apple Support: If you have the original proof of purchase, you can submit an Activation Lock support request to Apple. Technical Workarounds (Limited Functionality)
For devices where official methods aren't possible, enthusiasts use specific hardware or software exploits. Note that these often result in a "tethered" bypass, meaning the lock may return if the device is restarted.
Bypassing the iCloud Activation Lock on an iPhone 4s running iOS 9.3.5 is a technical challenge because the device uses the A5 chip, which requires a hardware-based exploit. Unlike newer devices that can be bypassed using software alone, the iPhone 4s generally requires an Arduino Uno and a USB Host Shield to run the "checkm8-A5" exploit. Recommended Bypass Methods
There are two primary technical avenues for bypassing the lock on this specific firmware: The Hardware Exploit Method (Reliable/Permanent):
Required Hardware: An Arduino Uno and a USB Host Shield 2.0. Software: Use tools like Sliver or Legacy iOS Kit.
Process: You load a specific script onto the Arduino that triggers the bootrom exploit when the iPhone is connected in DFU mode. Once "pawned," the software can delete the Setup.app file, allowing you to reach the home screen. The Downgrade Method (Alternative):
Some users have success by downgrading the iPhone 4s to iOS 6.1.3 using Legacy iOS Kit.
On iOS 6.1.3, certain "hacktivation" methods are more accessible, though you may still need the Arduino hardware to initiate the process on an A5 device. Common Limitations
While these methods can get you past the "Activation Lock" screen, they often come with significant trade-offs:
No Cellular Service: Most free bypasses are "tethered" or "no signal," meaning you cannot make calls, use SMS, or use cellular data.
No iCloud Services: You may be unable to sign into a new iCloud account or use the App Store normally without further complex workarounds.
Tethered Nature: If the device dies or restarts, it may return to the activation screen, requiring you to run the bypass script again. Legitimate Alternatives
If you are the original owner or have proof of purchase, the following official routes are always better than a technical bypass:
Bypassing the Activation Lock on an iPhone 4s running iOS 9.3.5 is possible, but reviewers and community experts emphasize that it is a complex process often requiring additional hardware or specific software environments. Most "one-click" online tools are scams Proven Bypass Methods Arduino + USB Host Shield (Recommended)
: This is considered the most reliable "hard" method for A5 devices like the iPhone 4s . It involves using an Arduino Uno USB Host Shield
to put the device into a "pwned DFU" mode, allowing for a permanent or "untethered" activation bypass Silver (Mac Only)
: Sliver is a well-known community tool that can bypass A5 devices on iOS 9.3.x, but it often requires the aforementioned Arduino setup to function correctly Legacy iOS Kit
: This tool can be used on Linux or Mac to downgrade the iPhone 4s to iOS 6.1.3 or 8.4.1, which sometimes resolves activation issues or allows for easier "hacktivation" DNS Bypass (Limited)
: A quick, software-only method involves changing Wi-Fi DNS settings (e.g., using 104.154.51.7 for North America) . This does
fully unlock the phone but provides a portal to use the web, YouTube, and some basic apps through a dedicated server Critical Considerations
I can’t help with bypassing Activation Lock, jailbreaking for unauthorized access, or any instructions that defeat device security. If you’d like, I can instead:
Which of these would you prefer?
Bypassing the Activation Lock on an iPhone 4s running iOS 9.3.5 is a complex process because Apple's security for the A5 chip is more robust on newer firmwares than on earlier versions like iOS 7. While many "extra quality" tools claim easy one-click solutions, most reliable methods for this specific device require hardware exploits or specific software workarounds. Legitimate Removal Methods
The most reliable and safe way to remove Activation Lock is through official channels. This ensures your device remains fully functional, including cellular and iCloud services.
Original Credentials: If you have the Apple ID and password, simply sign in on the device. If you forgot them, use the Apple ID Recovery tool to reset your password.
iCloud Web Removal: If the device was purchased second-hand, the previous owner can remove it remotely. They must sign in to iCloud Find My, select the iPhone 4s, and click "Remove from Account". The iPhone 4s has a specific hardware vulnerability
Apple Support Request: If you have the original sales receipt, you can start an Activation Lock support request with Apple for an official unlock. Technical Bypass Methods for iOS 9.3.5
If official methods are unavailable, technical workarounds exist, though they often come with limitations such as no cellular service (SIM signal) or being "tethered" (requiring a re-bypass after every restart). 1. DNS Bypass (No Computer Required)
This method doesn't remove the lock but lets you use some device features (web browsing, videos, games) by connecting to a custom server. Restart your iPhone and select your Language and Country.
On the Wi-Fi settings page, tap the "i" icon next to your network. Select Configure DNS and choose Manual. Enter the server IP based on your location: USA: 104.154.51.7 Europe: 104.155.28.90 Asia: 104.155.220.58 Rest of World: 78.109.17.60
Tap Back, then Done, and select Activation Help. You should see a message saying you've connected to the server. 2. Arduino + Checkm8-A5 Exploit
For a more permanent bypass that allows access to the iOS home screen, experts often use a hardware-based approach using an Arduino Uno and a USB Host Shield. This method exploits a bootroom vulnerability in the A5 chip that software alone cannot patch.
Tools Required: Arduino Uno, USB Host Shield, and bypass software like Sliver.
Limitations: This is highly technical and usually results in a device with no cellular signal (no SIM card functionality). 3. Third-Party Software Tools
Several tools claim to bypass Activation Lock on older devices. While some are reputable, others may be unreliable or introduce security risks.
I'd like to provide you with some helpful information regarding iPhone 4S activation lock bypass on iOS 9.3.5.
Disclaimer: Before we dive into this, I want to emphasize that bypassing an activation lock is against Apple's terms and conditions. Activation locks are a security feature designed to protect devices and their owners. If you're having issues with an activation lock, I recommend reaching out to the device's owner or Apple Support for assistance.
That being said, here are some points to consider:
Alternatives:
Activation locks serve a vital purpose in safeguarding devices. Engaging with or exploiting these security measures could lead to unintended consequences.
In the world of legacy tech, the iPhone 4s running iOS 9.3.5 is often seen as a "digital time capsule." However, for many users, that capsule is locked tight by an Activation Lock, turning a classic piece of hardware into a high-tech paperweight.
Over the years, the story of bypassing this lock has evolved from simple tricks to complex hardware exploits: The "DNS Portal" Era
One of the most famous chapters in this story involves the iCloud DNS Bypass. Users discovered they could trick the phone by connecting to a custom Wi-Fi DNS server (like 104.154.51.7 for North America). Instead of seeing the activation screen, the phone would load a web-based "portal" where users could watch YouTube, browse the web, or play basic games—though it never truly unlocked the phone’s cellular or full app capabilities. The Hardware Hack: Arduino and Checkm8
As security tightened, the community turned to hardware. Because the iPhone 4s uses the A5 chip, it is vulnerable to the Checkm8 exploit, which cannot be patched by software. This led to a more permanent, "extra quality" method involving an Arduino Uno and a USB Host Shield. By putting the device into a special "pwned" state, technical users could: Delete the setup.app file to skip the lock entirely.
Downgrade the device to older, more nostalgic versions like iOS 6.1.3. The Modern Dilemma
Today, while tools like 3uTools or specialized software like Sliver are often discussed in enthusiast forums, the consensus remains that a true, "perfect" bypass is rare. Most software solutions are "tethered," meaning the lock might return if the phone is restarted or restored.
For those looking for official support, retailers and official channels like the Apple Support Community emphasize that without the original owner's credentials or a valid sales receipt, the device remains legally restricted to protect user privacy.
iPad 2 iOS 9.3.5 Hello screen Activation Lock. How remove it??
Bypassing the activation lock on an iPhone 4S running iOS 9.3.5 is technically challenging because the device uses the A5 processor, which requires specific hardware-based exploits. Recommended Official Methods
Before attempting third-party tools, consider these reliable options:
Apple Support: If you have the original proof of purchase, you can start an Activation Lock support request directly with Apple.
Original Owner: The most effective way is to have the previous owner sign in to iCloud.com, select "Find My iPhone," and remove the device from their account. Technical Bypass Methods (iOS 9.3.5)
If official channels are unavailable, the following technical approaches exist: 1. DNS Bypass (No Computer Required)
This is a "partial" bypass that lets you use certain web-based apps (like YouTube, Games, and Maps) without fully unlocking the device. Steps:
On the "Activate iPhone" screen, press the Home button and select Wi-Fi Settings. Tap the "i" next to your Wi-Fi network.
Enter a custom DNS server based on your location (e.g., USA: 104.154.51.7, Europe: 104.155.28.90). Tap Back, then select Activation Help. 2. Arduino + USB Host Shield (Hardware Method) Result Quality: 8/10
For a more permanent "hacktivation," experts on Reddit's r/setupapp state that you must use an Arduino Uno and a USB Host Shield. This hardware is used to run the Checkm8-A5 exploit required for this specific model.
Warning: This method is highly technical and may result in a "tethered" bypass, meaning you must repeat the process if the phone restarts. It often disables cellular signals. 3. Third-Party Software Tools
Several tools claim to assist with iOS 9.3.5 bypasses, though their effectiveness on the legacy A5 chip varies:
Bypassing the iPhone 4s Activation Lock on iOS 9.3.5 is a common challenge for legacy device owners. While official methods require original credentials, several technical workarounds—ranging from DNS redirects to advanced hardware-based exploits—exist for "extra quality" or higher-success bypasses. Official Removal (Recommended)
The only permanent and secure way to remove the lock is through official channels:
Original Owner Credentials: Sign in to the Apple ID site or iCloud.com/find to remove the device from the account.
Apple Support Request: If you have the original proof of purchase, you can submit an Activation Lock Support Request to Apple Support. Technical Bypass Methods
For users without access to original credentials, the following methods are widely used in the legacy jailbreak community: DNS Bypass (Entry-Level)
How it works: By manually changing your Wi-Fi DNS settings during setup, you can redirect the device to a "bypass server".
Limits: This does not unlock the phone; it only allows you to use a web-based portal for apps, music, and browsing. Server Examples: USA: 104.154.51.7 Europe: 104.155.28.90 Asia: 104.155.220.58 Hardware-Based Exploits (High Success)
Arduino Method: This is considered a high-quality, permanent bypass for iOS 9.3.5. It involves using an Arduino Uno with a USB Host Shield to put the device into "pwndfu" mode.
Legacy-iOS-Kit: Once in this state, tools like Legacy-iOS-Kit or Sliver (on a Mac) can delete the setup.app file, allowing you to bypass the activation screen entirely. Third-Party Software Tools
Programs like iMobie AnyUnlock or PassFab iPhone Unlock claim to bypass activation locks for various iOS versions, including legacy models.
Note: Many of these tools require a jailbreak to function and may result in a "tethered" bypass, meaning the lock could return if the device is hard-reset.
For a detailed walkthrough of the technical bypass process on an iPhone 4s: iPhone 4s FULL iCloud Bypass Tutorial Icloud bypass 2021 YouTube• Nov 8, 2021 How to remove Activation Lock - Apple Support
I’m unable to provide a report that includes instructions or tools for bypassing an iPhone 4s Activation Lock, especially on iOS 9.3.5, as doing so would:
Legitimate alternatives if you legitimately own the device but forgot the Apple ID password:
If you’d like, I can instead provide a general report on:
Would that be helpful?
Technical Analysis of iPhone 4S Activation Lock Bypass on iOS 9.3.5
The iPhone 4S running iOS 9.3.5 represents a unique intersection of legacy hardware and firmware security. While modern iOS versions feature hardened, chip-level hardware encryption, the 32-bit architecture of the iPhone 4S allows for several documented—though often limited—bypass techniques. Summary of Known Methods DNS Bypass
: A widely documented method involving manual modification of DNS settings (e.g., to 104.154.51.7
) during the initial Wi-Fi setup. This does not remove the lock but redirects the device to a third-party server, allowing limited access to games, web browsing, and social media through a browser-based interface. Software-Based Exploits : Tools like attempt to delete or modify the
file within the iOS file system. Success typically results in a "hactivated" state where the device is usable as a media player, but cellular services (SIM signal), iMessage, and FaceTime often remain disabled. Official Removal : Apple provides the only permanent solution through an Activation Lock support request
, provided the user can supply proof of purchase such as a store receipt or invoice. Technical Challenges & Vulnerabilities About the security content of iOS 9.3.5 - Apple Support
I’m unable to provide instructions or content that promotes bypassing an iPhone’s Activation Lock. Activation Lock is a critical anti-theft feature from Apple, designed to prevent unauthorized access to a lost or stolen device. Attempting to bypass it—especially on an older device like the iPhone 4s running iOS 9.3.5—typically involves exploiting security vulnerabilities, using unauthorized tools, or misleading users into sharing personal data.
If you own an iPhone 4s and are legitimately locked out because you’ve forgotten the Apple ID and password, Apple provides official recovery steps through their account recovery process or by providing proof of purchase. I’d be glad to help you draft an informative piece about those legitimate options, or about the risks of using unofficial bypass tools (e.g., data theft, malware, or device bricking). Let me know how you’d like to proceed.
Published by: Tech Legacy Archives
Difficulty: Intermediate
Devices Covered: Apple iPhone 4s (GSM & CDMA)
Firmware Required: iOS 9.3.5 (Build 13G36)
Before diving into bypass methods, it is crucial to understand what kind of lock you have. This determines the solution:
Why does this distinction matter? Many users searching for an "Activation Lock bypass" actually have a carrier-locked device. If you see a message saying the SIM is not supported, no software bypass will fix this. You need a factory unlock (IMEI unlock).
However, if you are stuck at the iCloud screen, there is a unique hardware exploit available for the iPhone 4s that does not exist on newer phones.