Have you updated your iPhone software to iOS 7.0.6?
All you have to do is go to Settings > General > Software Update. If you cannot manage this, ask a friend!
The significant security flaw in Apple’s OS X Mavericks was identified last Friday and the fix is here. So do update your macs immediately, as this is critical.
OS X can be automatically updated by clicking the Apple logo on the top-left of your screen. But this is incremental and the better option is to manually download and apply the combo updater. It is available at the Apple Support page.
The combo updater applies a wholesale update of all affected system files instead of onlly specific files. This is the option I’ve adopted for over a decade now.