Allstate ALL.N has been sued by the state of Texas, which accused the insurer on Monday of illegally tracking drivers through their cell phones without their consent and using the data to justify charging more for car insurance.

The insurance firm is said to have used GasBuddy, Life360, and other smartphone apps to spy on drivers' whereabouts and cross-check their mileage.

Texas AG Ken Paxton is suing Allstate for allegedly collecting data from 45 million Americans to raise insurance premiums.

How Did Allstate Do It? The lawsuit claims that Allstate paid app developers millions of dollars to surreptitiously integrate its tracking software into popular apps. These mobile