If your contract is paid off, most carriers (AT&T, Verizon, etc.) will unlock it for free.
There is a gray-area workflow where 3uTools assists in a carrier unlock, but it requires external hardware. Some users pair 3uTools with an (a physical chip placed between the SIM card and the tray). Here is the actual process: carrier unlock iphone using 3utools
The "Unlock iPhone" button simply opens a portal to resell IMEI unlocking services from third-party vendors. You pay them, not 3uTools. If your contract is paid off, most carriers
Carrier unlocking an iPhone using 3uTools is a common topic among users looking to switch networks or use local SIM cards while traveling. However, it is important to distinguish between what the software can actually do and the common myths surrounding it. What is 3uTools? Here is the actual process: The "Unlock iPhone"
This feature does not hack your phone. Instead, 3uTools collects your device’s unique identifier (IMEI) and sends a request to a third-party unlocking service. These services have access to carrier databases or "whitelisting" servers. If your device qualifies, the unlock is pushed to your device via an OTA (Over-The-Air) update or a restore.