Is there a free unlock method for iPhone 5?

UltraSn0w does not support the iPhone 5. That software was designed for older devices like the iPhone 3G, 3GS, and certain basebands on the iPhone 4. For the iPhone 5, the only reliable and free method to unlock the device is through the original carrier. Most carriers will unlock a device for free once the contract is finished or the device is fully paid off. You can usually submit an unlock request through the carrier's website or by contacting their customer service. Once the carrier processes the request, the unlock is completed by connecting the device to iTunes or a Wi-Fi network. Avoid third-party software or paid services that claim to unlock the device, as they are often scams or unnecessary.