The Iowa and Iowa State players were caught engaging in online sports gambling, which they are prohibited from doing as NCAA athletes. Some of them, being galaxy brain geniuses, used a girlfriend's or family member's phone in an attempt to hide their activity.
The Iowa Gaming Commission stated there was no evidence that any Iowa or Iowa State games were compromised, unlike the Bama/LSU game.
With the number of states that allow online sports gambling, I expect similar incidents to emerge in the coming months.