How Do I Reset A Nokia 5200 To Its Factory Settings?

You can reset a Nokia 5200 to its factory settings by following the simple steps I've provided below.  Before you do that, however, it's worth noting that it's impossible to retrieve any lost data after the phone has been reset.  

It's important, therefore, to remember to backup any data you don't want to lose before you do the following reset. 

So, here's how you reset a Nokia 5200 to its factory settings:

1. Firstly, you need to turn the phone off by using the power button.
2. Now open up the dialler by pressing the call key.
3. Type the following code into the keypad - *#7370#
4. Now press the call key.
5. The phone should now have been restored to its factory settings.

That's how you hard reset the Nokia 5200.  If you simply need to soft reset the phone, you can do that by removing the battery, waiting about 10 seconds, and then reinserting the battery.