This service is used to check your Phones Blacklist status. If you are going to buy an Phone online, we highly recommend you to use this service. A lot of sellers on the Internet are selling iPhone locked version with the high price.
By using the IMEI number which you provided. This checking service will let you know if the Phone is Listed or not... and much more other information like iPhone carrier, Warranty, Activation date...everything from Apple GSX system
But please note that: This is not an Unlocking service! If you are looking for an unlocking service, please check it here: Official Phone Unlock
Example result of Phone blacklist status check
Find My iPhone: OFF - Sim Lock Status: Locked
IMEI : 0129630061*****
Product: iPhone 4 (8GB)
Model : SVC,IPHONE 4,GSM,8GB,BLK,PLCMNT
Version: 6.1.3
Serial Number: C7GGX19*****
WIFI : 98D6BB62B2E8
Bluetooth : 98D6BB62B2E7
ICCID: 89014103254823207125
Purchase Date: 12/19/11
Registration Date: 12/19/11
Warranty Status: Out Of Warranty (No Coverage)
Warranty Days Remaining: 0
Activation Policy ID: 52
Activation Policy Details: US GSM Service Policy
Next Tether Policy ID: 23
Next Tether Policy Details: US AT&T Puerto Rico and US Virgin Islands Activation Policy
Purchase Country: United States
Carrier: US AT&T Puerto Rico and US Virgin Islands Activation Policy
Unbrick: true
First Unbrick Date: 03/05/12
Last Unbrick Date: 03/13/15