Once activated, a trojan can block, delete, and copy data without access to the internet. That said, cybercriminals can only steal or send your data from your device when the internet is available. With your phone, trojan malware can work without the internet. Some of them can use SMS to send and receive data. If you’re not sure how to use CyberGhost’s antivirus to get rid of your trojan, you can always reach out to customer support — they’re super friendly and available 24/7.