Carriers blacklist phones for many reasons. The most common are: Lost or stolen phones,Fraud and unpaid bills. Once a carrier Blacklist's a phone it can no longer be used on their network or any Shared network in the Blacklist database. USA shares a Blacklist Data base so for example At&t Blacklist one of their phones it can no longer be use on USA At&t or any other network in the USA. How blacklisting works. To Blacklist a phone the carrier uses the phones IMEI number. This is a unique number given to each phone that identifies only that phone. Usually it is a 15 digit # that can be found by Dailing #06*# on phone like making a call. They place this number into a data base. Once in the data base any carrier/network that shares the data base will Block that IMEI number (phone) from being able to use their Network. Many people have asked will a unlocked phone work if it is Blacklisted? Simple answer no. By unlocking a phone you are removing the lock on the sim card. This means if the phone is locked it will only accept the sim card of the carrier it is locked to all other sim cards will come up as invalid sim card and the phone will not be able to use them. Once unlocked this restriction is removed allowing the phone to recognize all GSM sim cards. After being unlocked the phone has the ability to use any sim card, however if blacklisted the phone will be able to recognize the blacklist carriers sim card but the carrier will block the phone from using their network. Certain areas share a blacklist data base, but not a carriers will. Example a phone that is blacklisted in the USA will not be allowed to used (Blocked) by all carriers in the USA. This is because USA/and Mexico carriers share the same data base.(USA and Mexico Agreement) But carriers outside of the USA do not share the data base so the phone will work outside of the USA. So by unlocking your phone you will increase it’s resell value. You will now be able to sell it or give to someone outside of the USA and they will have a fully functional phone. How do I get my phone off the Blacklist? Once a phone has been Blacklisted, the way to have it removed from the Blacklist data base is to have the original phone owner contact the carrier that has put the phone on the Blacklist or use a Blacklist Removal, IMEI Cleaning service. If the phone was lost or stolen the original owner can tell the carrier to remove from Blacklist if unpaid bill the owner will have to make arrangements with the carrier before they will remove from Blacklist. There are some service’s that will remove your IMEI number from the Blacklist data base. If a Blacklist Removal-cleaning service is available for your device, Make sure to read full description of service. Some of the cleaning service’s may have limitations and if not followed device may be relisted in blacklist data base.

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