As the title states this app changes the IMEI on your device in less than 60 seconds. after changing IMEI just reboot device and you are all done.
Changing IMEI can let you earn money from various apps and try out different stuff.
Root not required.
Works well with most MTK based devices.
Works with a handful samsung HTC LG and Droid devices.
Incase if it does not work out for you try the DIY IMEI app on playstore