Apple N berry annouced about the permenent IMEI unlock method for the new AT&T iPhone. I found about the subject from the Google. May be it help your or not. Check the related link for it
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calculation of imei numbers to get unlock codes
No, iPhone imei can't change, it's unique. T
Huwei modems can be unlocked based on the IMEI of the device. This IMEI is a 15 digit unique number. Based on this IMEI the unlock code can be calculated.
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Huwei modems can be unlocked based on the IMEI of the device. This IMEI is a 15 digit unique number. Based on this IMEI the unlock code can be calculated.
If you never enabled Find My Iphone and want to try to track your iphone using IMEI number this website can do that: iphonetrace.
To unlock your Blackberry you will need to enter the unlock code. This code is just a calculation of IMEI number of your BlackBerry. To find your phone's IMEI number -type *#06# into your phone or look under the phone battery. There are different online services that will calculate the unlock code for your IMEI number. I can recommend BlackBerryMEP.COM (cheap and reliable). Note: don't share your IMEI number on free forums like this. It is not safe.
Here are the 4-methods to change IMEI on any Android device. This methods will work most of the devices. If you lost your IMEI number, then you will loose Network signal. You may facing this issue while rooting your device or Upgrading OS or Installing Custom ROMs.  Below guide will help you to fix IMEI or Invalid IMEI or even you change the IMEI number temporarily. These methods are working with or without Root Android device.
You can unlock any Huawei mobile using an IMEI Unlock Code.
Motorola i930 IMEI - 356254005231058
Liberar motorlora em326g imei 011806000963287