Like most free bypasses, you usually lose cellular signal (No SIM) and the ability to sign into iCloud via Settings (though the App Store usually works).
In many "free" versions, the bypass is tethered, meaning if your phone dies or restarts, you have to run the software again.
If you are downloading this from a third-party site, . Tools claiming to "Bypass iOS 15" for free often:
It’s a lifesaver if you have a "brick" and just want to use it as a media player or Wi-Fi-only device. However, if you need a daily driver with a working SIM card, you might find the limitations of the free version frustrating. A Quick Heads-Up
Once the device is in DFU mode, the actual bypass process takes less than 5 minutes. The Cons:
iOS 15 jailbreaking is hardware-dependent (iPhone X and older).
The software is surprisingly clean and straightforward. You don’t need to be a developer to navigate the "Start" and "Bypass" buttons.