Researchers have identified 60,000 domains associated with toll road text scams that go under the name of “FastTrak” and other state road systems, and that have targeted countless iPhones and Android phones.

Apple and Android phone makers like Samsung are largely powerless to stop the messages, which have increased in the past three months by 900%, and which cybersecurity experts say is most likely the work of Chinese criminal gangs.

The Ohio Turnpike and Infrastructure Commission is among agencies that have released a public service ad warning of the fraudulent texts.

Apple’s iPhones are supposed to have a safety feature that strips the link from the text, but hackers are finding ways to evade that, making it easier to fall for the ruse.

Aidan Holland, senior security researcher at threat research platform Censys stated that the hackers "are constantly changing tactics."

Jon Clay, vice president of threat intelligence at Trend Micro stated that "Apple doesn’t do anything about it. ... Android will add it to their spam list so you won’t get texts from the same number, but then the scammers will just change numbers. Apple has done a wonderful job of telling everyone their phone is secure, and they are, but not from this kind of attack."

Apple did not respond to a request for comment. for more, read the full CNBC report.