iPhone troubleshooting could be frustrating and annoying but it is very rare. The iPhone is a very stable device in general when it is not jailbroken. It is very difficult to cause problems with it as you are restricted from accessing the sensitive areas of the file system, which means a very stable device.
From all my previous hand held devices or PDA's, the iPhone is the most stable one. However, you might run into an issue every now and then that could be solved with some iPhone troubleshooting.
There are three simple ways to recover or fix many of the iPhone problems most of the time. Other problems could only be solved by an iOS upgrade from Apple, but I won't discuss those iPhone issues here. For example, the iPhone 4 antenna problem was an iPhone issue that was fixed with a software update to iOS 4.0.1.
It is easy to tell if the iPhone has problems. For example, it might start freezing, or slowing down or will have a slow internet connection even over wifi, or it might start missing some applications while syncing with iTunes, or simply not syncing at all. In worst cases the iPhone will reboot by itself when it idles or hang for a long time.
Here are 4 simple iPhone troubleshooting's techniques that might solve 99% of any iPhone issues you might have:
1- Restart or Reboot Your iPhone:
Just press and hold the power button at the corner of any iPhone for 2 seconds until you get the option to turn off. Slide the button to turn off your iPhone and then press and hold the power button one more time to restart the iPhone again.
2- Reset Your iPhone Settings:
This will reset your iPhone to factory settings which means that you will erase all the information on your iPhone. You can think of this iPhone troubleshooting as formatting your hard drive, but of course, you won't erase the the iOS, so the iPhone will function just as normal.
iPhone resetting is useful in several occasions. First, make sure you have backed your iPhone, or at least do a sync. Hopefully you already have done that.
If you are selling your iPhone or sending it to repair, and you don't want your information to be exposed, then resetting the iPhone is recommended. Maybe you want to have your iPhone repaired or serviced, and you want to delete every thing. Resetting is the way. Then you can restore your data from your backup when you get it back.
iPhone resetting solves many problems, including slow down, or any strange behavior.
If non of he pervious iPhone troubleshooting techniques solve your issue, then this option should be your third one. An iPhone restore is done within iTunes, by connecting the iPhone to iTunes and selecting restore. Visit the iPhone questions page to learn how to restore your iPhone.
4- Go to Recovery or DFU Mode:
This technique should be your last effort. You can create a brand new iPhone and mount it on your iTunes. Then you can restore iPhone from a back up, or just sync everything from scratch to the newly created iPhone.
This iPhone troubleshooting should be the last. It requires you to put the iPhone in DFU or recovery mode which is done by pressing the home button and the power button at the same time for 10 seconds, then releasing the power button, and keeping the home button pressed for another 10 seconds. All of this should be done while the iPhone is connected to iTunes.
Watch the following video to learn how to put the iPhone in DFU or recovery mode.
5- Reinstall Mobile Substrate:
When the iPhone problem is very difficult to diagnose and find, it might be best to remove and install the Mobile substrate from scratch.
This method guarantees keeping your iPhone jailbreak and Cydia, but it removes any iPhone hack or iPhone application installed using Cydia.
It is simply one of the best iPhone troubleshooting techniques available. It is time consuming though, and will require you to re-install every Cydia App and iPhone hack.
Once you find the hack that is causing the iPhone problem you were having. Then you can remove it and report the iPhone problem to the author of the hack in order to fix it.