The most efficient way is to try with a SIM card from a different network (you can briefly borrow it from a family member or a friend). This way works with any phone whether it's an Android, iPhone, Windows Phone or BlackBerry or something else.
To see if your phone is network locked follow these steps:
- Make a phone call using the current SIM card. Make sure it connects.
- Power off the iPhone. Hold down the Sleep/Wake button and use the Slide to Power Off option to switch off the iPhone.
- Use the SIM-card ejector tool (or a paper clip) to eject the SIM card from the iPhone.
- Insert a different SIM card.
- Press the Sleep/Wake button to wake up the iPhone.
- Make a phone call. Check that the iPhone can connect a call using the new SIM card.
On most phones, you'll get a very clear message that your phone is network locked when you try to use a SIM card from another network. If a message does not appear, try making a phone call. If the phone call does not connect with the new SIM card, then the iPhone is locked.
If you find out that your phone is locked, have a look at our Guide To Unlock available here.
If you are unable to try operating your phone with a different SIM and if you have an iPhone, another method is to navigate to the Settings menu and have a quick look there:
- Open Settings.
- Tap Mobile Data > Mobile Data Options. (In older versions of iOS you will just have to tap Mobile)
- Check for an option named Mobile Data Network.
If you see an option for Mobile Data Network then your iPhone is most likely unlocked. This option should not appear on locked iPhones.
With Android phones, you can check if the device is network locked using IMEI number:
- In Phone App dial *#06# and your IMEI number will appear on the screen.
- Go to www.imei.info (you must create an account and log in to be able to see the network information about your phone) and enter your IMEI number in the website's search box.
- Next to the information about the phone with the IMEI number you've entered, under "Free Checks" menu tap on Warranty via SN.
- Once the loading is complete, you will see the information about the network and whether it is locked or unlocked.
In case you don't want to go through these processes mentioned above, to be hundred per cent sure whether your phone is locked, give a call to your network provider and they will be able to answer your question.