How to Carrier Unlock Android Phone to Use Any SIM

In this article, you will learn how to unlock Android phone from a carrier and use a preferred SIM. For faster SIM unlocking, you need dr.fone - SIM unlock.

Aug 14,2017 • Filed to: SIM Unlock • Proven solutions

Getting carrier locked on the phone is one of the worst things that can happen especially when you feel there is not much you can do about it. But that’s not really true. There are few ways that could help alleviate this problem or which could come as a help in such circumstances when the Smartphone is carrier locked. This problem often requires help from the carrier or network and can be easily sorted on doing so.

Now, having talked about SIM lock or carrier lock, it is also important to know whether a device is SIM locked or not, because not all phones are SIM locked. So, to find out whether your phone is network locked, you can check the documentation of the device that you received while purchasing. If the phone is unlocked, the “unlocked word would certainly appear on the receipt. To be sure and precise whether the phone is SIM locked, the best thing that can be done is to contact the carrier and check if the phone is carrier locked. Before that, you can even check the phone yourself by placing a different SIM in the phone and check whether it works. If the same issue persists even with different SIMs, then there is a good chance that the phone is carrier locked. Now that we know how to check if the phone is SIM locked, it is imperative to know how to unlock Android phone for different carrier. It is not that difficult a task to unlock carrier locked phones and there are a few methods to unlock such locked phones.

Part 1: Asking the Carrier to Unlock

One of the best options is getting in touch with the carrier and asking them to unlock the SIM locked phone. For that to happen, it is important to first know whether the phone is SIM locked and then whether the phone can be unlocked and if you are eligible to unlock the phone. There is an eligibility clause in contract for Smartphones bought on contract and if a specific time period is not up yet, then a termination fee is required to be paid by the user to break the contract in order to be able to use any SIM on the device after getting the unlock code.


• This is the best way to unlock carrier locked devices.

• This is legal and everything happens based on the clause mentioned in the contract.


• Sometimes, even the network providers or carrier refuse to unlock Smartphone

• There is a certain time period which if not over yet, unlocking the phone would require termination fee.

Part 2: Professional Reputable Smartphone Unlock Service

If you have tried out contacting the carrier and there is no way the carrier is unlocking your phone, you can opt for professional unlock service which could be of help. But finding such a professional service is not an easy task. There are some sites and service providers which require the IMEI number of the phone to create unlock codes. IMEI number of the phone is given to the professional SIM unlock service post which, they generate a special character combination which can be used to get the cell phone out of network restrictions. So, the phone can be unlocked remotely by using the special remote unlock codes.

Sometimes, the professional Smartphone service providers even ask for the phone to be sent to them to get the phone unlocked.


• This method could be opted as a last resort if there is no help from the carrier.

• Professional and reputable Smartphone unlock service providers tend to serve the purpose as they are specialized in this task.

• There are not many obligations involved.


• This might attract legal actions against the user.

• It is very difficult to find such professional Smartphone unlock service providers.

• Reliability on such service providers is also another factor which requires attention.

Part 3: dr.fone - Android SIM unlock

This program can also be used to unlock SIM locked Android devices. This program can be easily launched and used by following a few simple steps as mentioned below:

dr.fone - Android SIM Unlock

The fastest way to unlock your phone.

  • Simple process, permanent results.
  • Supports over 400 devices.
  • Operates in over 60 countries.
  • No risk to your phone or data.
Available on: Windows
3981454 people have downloaded it

Step 1 - Launch dr.fone

Launch dr.fone on the computer and from More Tools tab select “Android SIM Unlock”.

android sim unlock

For Samsung S2-S4, Note 1-Note 3

Step 2 - Connecting the Android device

To start with the process, use a USB cable to connect the Android device to the computer. Ensure that the USB Debugging mode is enabled on the Android device. If not, go to “Developer Options” in settings to enable the same. If you don’t see the developer option, tap on the build number seven times to enable developer options.

dr.fone normally detects the device automatically without any issues.

android sim unlock

Then click on the “Next” Button to move on with the process.

Step 3 - Enter USB settings/Diagnostic/Service Mode

Instructions to enter USB settings/Diagnostic/Service Mode on the Android device show up on the program interface.

Dial *#0808# or #9090# or##3424# on the Android phone. One of these codes will work and the Android device will enter USB settings/Diagnostic/Service Mode automatically.

android sim unlock

Select UART[*] or CDMA MODEM or DM + MODEM + ADB on the Android device. Check now if the phone is properly set and then click on "Unlock".

Step 4 - Unlock the phone

After you click on "Unlock", dr.fone will start the SIM unlocking process on the phone. Just wait for the process to finish which might take few minutes.

android sim unlock

After the process, the phone needs to be brought back to normal mode. So, click on Restore Mode on the program to continue. Restoring the phone to normal mode requires few codes. So, dial *#0808#or#9090#or ##3424# on the Android device and select USB[*] or PDA or MTP + ADB on the hidden menu.

android sim unlock

Then, click on "Next" and it's done. The phone is now successfully SIM unlocked and will enter normal mode now.

For Samsung S3-S7

Unlocking these devices is simpler but this process requires rooting the Android device.

Step 1 - Connecting the Samsung phone

Using a USB cable, connect the rooted Android Samsung device to the computer. dr.fone will detect the device automatically.

android sim unlock

Click "Unlock" to continue.

Step 2 - Unlocking the Android device

After you click on Unlock, the program will automatically start the SIM unlock process on the device. The process will take few minutes to finish.

The phone will restart once in the process. You need to just make sure that the phone is properly connected till the process is complete.

android sim unlock

Selena Lee

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