To know if your phone is unlocked, you can use several straightforward methods depending on whether you have an iPhone or an Android device:

For iPhone:

• Open Settings.
• Tap General , then About.
• Look for Carrier Lock (or similar wording).
• If it says No SIM restrictions , your iPhone is unlocked and can be used with any carrier.
• If it shows a specific carrier name or says SIM Locked , the phone is locked to that carrier

For Android:

• Open Settings.
• Go to Connections or Network & Internet (varies by manufacturer).
• Tap Mobile networks.
• Select Network operators or Choose network.
• Turn off Select automatically to see available networks.
• If you see multiple network options, your phone is likely unlocked.
• If only your current carrier appears, it is probably locked

Additional Methods:

• Try a SIM card from a different carrier: Power off your phone, replace your SIM with one from another network, and power it on. If you can make calls, send texts, and use data, the phone is unlocked. If you get an error or a prompt for an unlock code, it’s locked

• Contact your carrier: Provide them your phone’s IMEI number (found in Settings > About Phone or by dialing *#06#) and ask if your phone is locked or unlocked

• Use an online IMEI checker: Enter your IMEI on a trusted IMEI checker website to see the unlock status, though some services may charge fees or vary in accuracy

These methods combined will give you a reliable indication of whether your phone is unlocked and free to use with any carrier.