iPhoneUnlock.Zone Unblacklisting Service allows you to unbar / unblacklist your iPhone:
Cleaning Service for Barred / Blacklisted IMEIs
When an iPhone gets blacklisted by a Mobile Network, it is not only locked from that network, but also all the other mobile networks inside the same country, treat this iPhone as blacklisted. This means, that you will not be able to use this iPhone anymore within this country, even if you unlock it!
Also, several countries started to share blacklists between them, so if your iPhone gets blacklisted inside one country, there is a chance that it will also get blacklisted to another country too. For instance, if an iPhone gets Blacklisted inside USA, it will also get blacklisted to Canada, Mexico and Puerto Rico.
Unbaring/Unblacklisting your device, will allow to use your iPhone to all countries that share the same blacklist!
What UNBAR/UNBLACKLIST means?
The Unbar/Unblacklist service will remove the blacklist status of your iPhone, so you can later unlock it and use it inside the country (And all its mobile networks) without any restrictions.