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This next suggestion is less of a fix for specific problems and more of a good practice to get into. As I mentioned in a previous chapter, Apple is constantly releasing updates to the iPhone operating system, occasionally adding new features, but mostly for fixing bugs and problems that are reported. And it's just a good habit to get into making sure your iPhone or iPod touch is running the current software. Generally whenever you plug your device into your computer and open iTunes, iTunes will check to see if you're using the most recent software on your iPhone or iPod touch. If an update is available you'll see a message asking if you want to update.
But you can also manually check for updates by selecting your device in the source pane and under the Summary tab here, click Check for Update. And as you can see I'm currently running the most current software on my iPhone. You can also check for updates directly from your device if you're not near your computer. Go to your Settings>General and Software Update, and here you'll either see a message telling you that your software is up to date or you'll see a message telling you that an update is available, in which case you'll be able to update your device from here without needing to connect it to your computer.
Again, checking for and installing updates is just a good habit to get into and it won't necessarily fix an immediate problem you might be having and it might also prevent you from experiencing a problem you didn't even know you were heading towards by fixing the problem before you ever encounter it.
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