These cheap phones come at a price -- your privacy

Cheap phones are coming at the price of your privacy, security analysts discovered.

At $60, the Blu R1 HD is the top-selling phone on Amazon. In November 2016, researchers caught it secretly sending private data to China. Shanghai Adups Technology, the group behind the spying software on the Blu R1 HD, called it a mistake. But analysts at Kryptowire found the software provider is still making the same "mistake" on other phones. At the Black Hat security conference in Las Vegas on Wednesday, researchers from Kryptowire, a security firm, revealed that Adups' software is still sending a device's data to the company's server in Shanghai without alerting people. But now, it's being more secretive about it. "They replaced them with nicer versions," Ryan Johnson, a research engineer and co-founder at Kryptowire, said. "I have captured the network traffic of them using the command and control channel when they did it."