The most secure and permanent way to unlock an iPhone for worldwide use is through your original mobile carrier.
If a carrier refuses an unlock request, certain software tools claim to bypass these restrictions. simunlocker-unlock-iphone-sim-card-worldwide-tool
: Most carriers, such as AT&T or T-Mobile , require the device to be fully paid off, the contract to be completed, and the account to be in "good standing" with no reports of being lost or stolen. The most secure and permanent way to unlock
: You must contact your current provider and request an unlock. Once approved, the carrier sends a "server unlock" signal to Apple. : You must contact your current provider and
: You can check your status by going to Settings > General > About > Carrier Lock . If it says "No SIM restrictions," your iPhone is already unlocked. Third-Party Software Tools