Update your iPhone with the latest update iOS 10.3.3 which has a security update that patches several bugs in the mobile operating system.
Among these bugs was a vulnerability that would allow attackers to remotely execute arbitrary code on the Broadcom Wi-Fi chip used in iOS devices that could let them take control of the device.
The iOS bug is known as CVE-2017-9417 and the existence of the bug was first revealed in an Android security bulletin. The bug affects Broadcom's BCM4354, 4358 and 4359 chips and many iPhones uses these chips to connect to the Wi-Fi, including devices from HTC, LG, Google, Samsung and Apple.
Be sure to update your smartphone today and protect your online data.