Check to see if the device IMEI is blacklisted by the network Delivery Time: 1-24 hours*. This service will determine whether your IMEI has been blacklisted by a network, it will provide a date that the service to your handset was blocked. This service will also tell you the network your handset is locked to, should you not know who the phone provider is. When purchasing this service please leave the IMEI number in the comments. You can find your IMEI by typing *#06# into the keypad of your handset