How to Prevent iPhone Hacking
Because of their small size and portability, users often mistakenly think of their iPhones as merely phones, not computers. In reality, they are both and should be treated as such. Your iPhone uses a Web browser and connects to networks, making it susceptible to hacking. Take steps to keep your iPhone secure and protect it from hackers, just as you would your computer. Without these precautions, hackers can gain access to any information stored on your iPhone.
Lock your iPhone with a passcode by tapping "Settings," "General" and "Passcode Lock." Tap "Turn Passcode On" and enter a four-digit number. This encrypts the data on your iPhone when it is locked, keeping your personal information safe from hackers.
Turn off your Wi-Fi when you aren't using it by tapping "Settings," "Wi-Fi" and "Off." An open Wi-Fi signal leaves your iPhone vulnerable to hackers. You'll still have Internet access through the 3G network.
Update your iPhone often. New updates from iTunes and Apple often contain important updates to security features.
Enter the password each time you connect to a network, instead of setting your iPhone to store the password. If the information in stored, copycat networks may gain access to your information.
Take caution when clicking links, as some phony websites may be set up to allow hackers access to your iPhone. Never click links in emails or websites you are not familiar with. Instead, type the website directly into the address bar.