"The best way to detect if your iPhone has been hacked is to download an app like Lookout that tells you whether your phone has been "jailbroken".
To remove an iPhone hack, simply update to the latest version of iOS. And to protect against future hacks, make sure that your phone is password protected so no one can get physical access to jailbreak it again...
Once you clear the hack, reset all of your passwords for social accounts and iCloud to prevent other means of spying on you."
