Before we talk about jailbreaking, we must understand the firmware.
iOS 15.7.3 was released in January 2023 as a security patch for older devices that could not upgrade to iOS 16. The iPhone 7’s last official major iOS version is iOS 15. Apple has continued to push minor security updates (like 15.7.9, 15.8, etc.), but 15.7.3 is significant because it sits in a sweet spot: it is patched enough to be stable, but old enough that several exploit researchers have had time to analyze its kernel vulnerabilities.
For the jailbreak community, iOS 15.x is the final stop for the iPhone 7. The device is 64-bit (ARM64), not the newer ARM64e (A12+), which means it is easier to jailbreak than modern iPhones. However, it is still protected by Apple’s hardened runtime, SSV (Signed System Volume), and PPL (Page Protection Layer). iphone 7 ios 15.7.3 jailbreak
Warning: Backup your iPhone 7 first. Palera1n is stable, but always be safe.
To understand why the iPhone 7 can be jailbroken on 15.7.3, one must first understand the checkm8 bootrom exploit. Before we talk about jailbreaking, we must understand
Because checkm8 is burned into the read-only bootrom, Apple cannot fix it with a software update—including iOS 15.7.3. Therefore, any iPhone 7, regardless of iOS version (15.0 to 15.8.x), is theoretically jailbreakable.
Realistically, no. The jailbreak community has moved on to iOS 16 and 17, focusing on ARM64e devices and new exploits like kfd, MDC, and the kernel bugs in iOS 17. The iPhone 7 is considered “legacy” now. An untethered jailbreak (persistent after reboot) would require bypassing Apple’s cryptographic chain of trust, which hasn’t happened for modern iOS versions since iOS 9.3.4. Warning: Backup your iPhone 7 first
Your best and only future-proof method is palera1n. It will continue to work as long as you keep your iPhone 7.
The iPhone 7 is equipped with the A10 Fusion chip. Critically, this chip has an unpatchable hardware exploit known as checkm8. Because this is a hardware-level vulnerability, Apple cannot fix it with a software update.
For iOS 15.7.3, the tool of choice is Palera1n.