"If you active an unlocked phone on your carrier and want to give that phone to someone else on a different carrier, is the phone still unlocked or is it now locked on your carrier?"
If you are a contract iPhone user or bought a second-hand iPhone with monthly pay contracts & SIM Only plans, maybe you are confused about how to SIM unlock your iPhone to switch to a different carrier. When you try to do it, you must have encountered one of four situations. This SIM lock is because Apple permits the network provider to lock your iPhone, so it can only be used in certain countries or a specific SIM carrier.
Don't worry. Dr.Fone provides valuable and convenient SIM unlock services for iPhone users. This guide will show you the completed operation process to help solve the problem.
Make sure your iPhone has connected to the computer. Click on "Confirmed" to continue.
Close the popup window and turn to "Settings->Profile Downloaded". Then click "Install" and enter your screen passcode.
Click "Install" on the top right and then click the "Install" button again at the bottom. After finishing the install, turn to "Settings->General".
Scan the QR code which appears on your screen.
Click on the blue text in the middle of the image above, then choose "Enter Details Manually" to input the SM-DP+Address and Activation Code below.
Select "Add Cellular Plan" and wait for it to finish. Then click "Dismiss" and follow the guides to enter the tool.
When your iPhone is activated, turn to "Settings->General->About", find the "Carrier Lock". However, if you see "SIM locked", please restart your device. If it shows "No SIM restrictions", please go to "Settings", open the "Cellular" menu.
Open the cellular plan you added just now and close "Turn on This Line". Then, you can use any SIM card now! Please click on "Next" to complete the last process.
In step 6, we set the network and configure proxy, which may make users unable to access the Internet. Therefore, removing setting could help close the Wi-Fi configure proxy.
Congratulations! You can use any network carrier and SIM plan now!
Note: If your phone is factory reset or flashed, it needs to be reactivated the SIM unlock function.