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Thread: FAQs }-IMEI-UNLOCK-NETWORK Information For beginner

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    Post FAQs }-IMEI-UNLOCK-NETWORK Information For beginner

    -A-VERY-USEFUL-INFORMATION- STAY TUNE WITH

    What is an IMEI ?
    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.


    Where do I find the IMEI # ?
    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


    Why is my phone locked ?
    When the purchase price of the mobile phone to the consumer is subsidized with revenue from subscriptions, operators must recoup this investment before a subscriber terminates service. In order to secure their investments, GSM network providers implements a software feature called SIM Lock on the handset to prevent usage outside their network. Such subsidies are worth more than several hundred US dollars and in that's why carriers also charge an early termination fee; another form to recoup the subsidy investment.


    Why should I unlock my phone ?
    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.


    What is a SIM lock ?
    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.


    What is an Unlock Code ?
    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


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


    Will a software update lock my phone ?
    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.


    What networks are compatible with my phone ?
    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
    - Europe 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


    Can I use the original network after unlocking ?
    Yes, for example if you unlock an AT&T phone, it will still work flawlessly on AT&T.


    What ARE results of unlocking ?
    An Unlock Code (all brands execpt iphone) or Unlock Activation (iphone) will SIM Unlock the handset from the original locked network, to be used on other GSM networks.


    Will my unlock code expire ?
    No, unlock codes are permanent and do not expire.


    What is a Factory / Manufacturer unlock method ?
    When using a Factory or Manufacturer unlock method the code is acquired directly from the Factory or Manufacturer of the handset (e.g. HTC, LG). This method is usually more expensive but delivers 95% of orders successfully.
    ....{{source from network information technology!




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    Last edited by AzimBahar; 02-25-2017 at 12:26 PM.
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