There may be a few countries in which AdBlock VPN may encounter installation, payment, or performance issues. These include the embargoed countries of Cuba, Iran, North Korea, Sudan, Syria, and Crimea region of Ukraine (under Russian occupation). 

Additionally, while it should be possible to install and pay for AdBlock VPN in China, Russia, Belarus, Turkmenistan, Uganda, Myanmar, Iraq, Turkey, United Arabs Emirates, and Oman there may be issues with performance that are outside of our control. 

We are happy to offer a full refund within 60 days of purchase if you encounter any issues while using AdBlock VPN in any of these countries.