Trust Wallet warns Apple users to turn off iMessage because of a dangerous flaw.

The flaw could let hackers control iPhones without needing users to click on anything.

Trust Wallet's CEO showed a screenshot of the flaw being sold for $2 million, but some people doubt its credibility.

Over 1.2 million users saw Trust Wallet's warning within four hours.

Trust Wallet says their information came from their security team, but some people still question it.

Apple hasn't responded yet, but they recently fixed two other serious iPhone vulnerabilities.