Step by step Guide
1. install xposed installer and launch it then goto framework and click install/update
2. after successful install/update restart your phone
3. install Imei changer
4. open xposed installer and tap on module, from the module list tick imei changer then launch imei changer from xposed installer
5. input your blacberry imei in the space provided and click apply
6. reboot your phone and dial *#06# to check if imei change is successful