By altering the hosts file on a computer, Doulci tricked the iPhone into thinking it was communicating with Apple when it was actually communicating with the Doulci server. This allowed the device to skip the activation screen.

These tools often require you to disable your antivirus or share device identifiers (IMEI/Serial numbers), which can be harvested and used for identity theft or fraudulent activities. Better Alternatives for Unlocking Your Device

: If you have the original proof of purchase, Apple can officially remove the Activation Lock for you. iCloud.com

This feature has made stolen iPhones nearly worthless to thieves, but it has also created a nightmare for legitimate buyers of second-hand devices who lose contact with the original owner.

In the world of second-hand iOS devices, few things are as frustrating as purchasing an iPhone or iPad only to discover it is locked to a previous owner’s iCloud account. This security feature, known as Activation Lock, is Apple’s robust anti-theft mechanism. For years, it has stumped buyers and technicians alike, leading to a booming market for "bypass" tools.

: The original DoulCi project and its official servers were shut down nearly a decade ago (around 2014). Security Risks

If you are locked out of an Apple device, consider these legitimate methods: Apple Support