iOS Update 9.3.5
If you have an iPhone, an iPad or an iPod Touch, you need the iOS update to 9.3.5 urgently.
To update, go to Settings, General, Software Update. Your device will check for the latest software and you can then choose to update your device.
The update is to fix a critical security problem that can be used to remotely access your contacts list, read your emails and text messages and call history. It can also record sound, collect passwords and track the location of the device by using the GPS, cellular data or local wifi access points.
This is as bad as it gets with malware and I would advise you to update NOW.