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Unlocking your cell phone has multiple benefits : It increases the resell value and marketability of your phone by not restricting the resell to a specific carrier, it allows the handset to work worldwide (See What networks are compatible with my phone ?), it eliminates roaming charges by allowing you to switch to a local carrier in the local region.

An Unlock Code is a numeric string. When entered into a locked handset it releases the SIM lock restriction and allows the handset to be used on other GSM carriers.

Insert a SIM Card from a different carrier than the one your handset is using. When power up is complete the handset will display a message like those below if it SIM locked :

- Enter Subsidy Code
- Enter Unlock Code
- Incorrect Sim Card
- Insert Correct Sim Card
- Invalid Smart Chip
- Phone Restricted
- Sim Network Unlock Code
- Sim Network Unlock Pin
- Special Code Required
- Wrong Sim Card

It is a software capability built into GSM phones by mobile phone manufacturers. Network providers use this to restrict the use of these phones to specific countries and network providers.

The IMEI (i.e. International Mobile Equipment Identity) number is used by a GSM network to identify devices attempting to connect to them and therefore can be used for stopping a stolen phone from accessing that network. It's only used for identifying the device and has no permanent or semi-permanent relation to the subscriber. The IMEI number includes information on the origin, model, and serial number of the device.

IMEI = 14 digits + 1 Check Digit
IMEISV = 14 digits + 2 Digit Software Version Number
IMEI + SV = 14 digits + 1 Check Digit + 2 Digit Software Version Number

The format of the IMEI is AA-BBBBBB-CCCCCC-D, (15 Digits) although it may not always be displayed this way. The IMEISV drops the Luhn CD (i.e. Check Digit) in favour of an additional two digits for the SVN (i.e. Software Version Number), making the format AA-BBBBBB-CCCCCC-EE. The IMEI+SV incorporates both the check digit and the additional two digits for the Software Verison Number, making the format AA-BBBBBB-CCCCCC-D-EE.

On many devices, the IMEI number can be retrieved by entering *#06#, or is located in the battery compartment.

Android : Settings --> About Phone
Blackberry : Options --> Status
iOS : Settings --> General --> About
Sony Ericsson (New Devices) : Options --> status.
Sony Ericsson (Old Devices) : Dial * Right * Left Left * Left

To determine compatible networks the customer will need to verify the compatibility of the frequency band from their handset and desired network.

GSM networks operate in a number of different carrier frequency ranges with most 2G GSM networks operating in the 900 MHz or 1800 MHz bands and 3G networks 850 MHz and 1900 MHz bands. In rare cases the 400 and 450 MHz frequency bands are assigned in some countries because they were previously used for first-generation systems. Most 3G networks in Europe operate in the 2100 MHz frequency band.

Africa, Asia, & Middle East
             900 MHz {Most widely used} & 1800 MHz
             900 MHz {Most widely used}, 1800 MHz, & 2100 MHz {3G}
North America:
             USA 850 MHz & 1900 MHz
             Canada 850 MHz {Backup / Rural Areas}, 1900 MHz {Urban Areas}
South America:
             Brazil 850 MHz, 900 MHz, 1800/1900 MHz
             Costa Rica 1800 MHz
             Ecuador & Panama 850 MHz (Exclusively)
             Guatemala, El Salvador, & Venezuela 850 MHz and 900/1900 MHz
             Peru 1900 MHz

No, unlock codes are permanent and do not expire.


No, OEM software / OS updates should not lock the phone. However, in the event that the phone does lock again, the customer can reuse the original lock code already purchased to unlock the phone.

Yes, as soon as the phone has been unlocked with us, it will stay this way forever.

Sure. Please register to our website we offer special discounts for professional unlockers.

We accept a wide range of payment methods:

If you want to unlock one phone only :

  1. Visa
  2. Mastercard
  3. American Express
  4. Paypal

To find out if your phone is locked, simply place a different SIM card in the phone and turn the phone on. Ensure you use a different SIM and not the SIM that the phone was supplied with. If the phone does not allow you to view the menu and displays an error message such as 'SIM not valid', 'Phone Restricted', 'SIM not accepted' then your phone is most likely to be locked. If the phone does allow you to view the menu then the phone in unlocked.

No, unlock codes are permanent and do not expire.

n order to cancel out an already existing order, you will need to click the cancel button on the codes page located to the right near that specific imei. If the cancellation button is not displayed, this means the order has been batch and processing on suppliers main server. For which you will need to open a support ticket requting cancellation.

Each provider for each unlock method have their own cancellation policy. Once the cancellation request is received, the order will be in a pending status which means it is not yet cancelled. It will reflect a status of either Cancelled or Not Cancelled shortly thereafter depending on whether or not the supplier has begun to process the code. We advise you to please wait until you receive this notification before you refund your customers because if the supplier has already begun to process the codes then your request will be rejected and you will not be refunded.

To request a full copy of our API Documentation and API Key, please access your account and proceed to the tab at the top of the screen marked "API KEY", follow the instructions listed and the documents will be emailed to you shortly. If you have any issues please feel free to contact us or open a support ticket from your portal.

If you think you received the wrong unlock code, you have 5 days following the delivery of your order to request, free of charge, the supplier to verify the code. You can launch this procedure by pressing the "Verify" button in the "Order History" section in your 24Unlock portal.

You also accept that for some unlock tools (including, but not limited to, the tools that come for a calculator and that are guaranteed to return everytime the same code) this procedure may not be available. If, after the verification procedure has been launched, the code is the same as the first one, Unlock4Dealers will issue a refund of your order if you provide a video proof; this video proof must be compliant with the rules listed under "Refund Policy" page.  Click on the following link for details:

The delivery time, will depend on the service you choose based on the device you are processing. Each service is have detailed descriptionsin which will also state the "estimated delivery time", as each of our suppliers have different delivery schedules. In general, entering an unlock code on a phone once you've received it takes just a couple of minutes or less.

There is an important difference between unlocking and unblocking a cell phone. Unlocking a cellphone from a service provider to be able to choose another is perfectly legal, but when a mobile phone is “unblocked” criminals can change the IMEI number and make the cellphone operational again. This practice is illegal and only the manufacturers are allowed to alter it.

Unblocking mobile phones is a criminal offence and carries custodial sentences. It is even an offence to simply offer to unblock or reprogram a phone.

  • Delivery Times and Cancellation

    All unlock codes and unlock confirmations are sent by email to the email address that the customer enters on the order form. Delivery times shown on the website are guidelines on...

    Delivery Times and Cancellation
  • Refunds

    Refunds If no unlock code is found for a particular phone, a refund will be processed within 24 hours of us becoming aware that no code is available. All refunds can take around 7 ...

  • Fraud Protection

    As a result of the so many fraudulent orders that we receive each day, it is imperative that we take all necessary measures to minimize credit card fraud. Therefore, we reserve th...

    Fraud Protection
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