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Run Android on an iPhone With 'Project Sandcastle' Jailbreaking Tool

Corellium used the Checkra1n jailbreaking tool to port Google’s Android OS to the iPhone. The result is Project Sandcastle, which can load Android 10 on an iPhone 7 or 7 Plus. Apple is likely to be displeased.

 & Michael Kan Principal Reporter

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You can now run Android on older iPhone models, thanks to a new software tool.

On Wednesday, the startup Corellium announced Project Sandcastle, which can load Android 10 on an iPhone 7 or 7 Plus model, despite the iOS software restrictions in place. Forbes got a hands-on look with a Project Sandcastle iPhone, and confirmed the tool does work. Other users have been posting pictures and videos of successful Android-to-iPhone transfers. 

The port was pulled off with the help of a separate jailbreaking tool called Checkra1n, which was released last year. The iOS hacking community began developing Checkra1n after an unpatchable hardware-based vulnerability in older iPhones was found that can theoretically load whatever software process you desire. Developers at Corellium then used Checkra1n to port Google’s Android OS to the iPhone. The result is Project Sandcastle, which you now download from the company’s website. “We’re excited to see what the developer community builds from this foundation,” the startup tweeted on Wednesday.


Credit: Twitter user @Basti564

Project Sandcastle is currently only available for iPhone 7 and 7 Plus. But because the Checkra1n jailbreak works on iPhone models from the 5s up to iPhone X, Corellium is hoping to expand Project Sandcastle support to more devices in the future.  

To run Project Sandcastle, you'll need to download Checkra1n tool, which requires you to tether a PC to the iPhone in order to install the jailbreak.  However, Checkra1n currently only supports macOS and Linux. 

Another significant limit is how if you ever reboot the affected iPhone, it will return the device back to the normal iOS state. So Project Sandcastle is more of a temporary way to get Android on your iPhone as opposed to a permanent change.

Apple probably won’t be happy with the news. Last year, it filed a copyright infringement lawsuit against Corellium over how the startup was selling an iOS simulator that security researchers used to find flaws in the operating system. The tech giant contends Corellium is illegally profiting off iOS while the startup argues Apple is trying to stifle innovation and suppress attempts to uncover vulnerabilities. 

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About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

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