Is it possible to wirelessly back up my iphone to iTunes?

So I was recently on a camping trip and I accidentally dropped my iphone into a small puddle. At first I didn't notice anything wrong. But now I can only charge my iphone 4s when it is off and when I plug it into my computer, it doesn't recognize it. I'm pretty sure that its the charging port on the phone. I already know that you can wirelessly back up to itunes but I didn't set it up and there's no way for me todo it if itunes doesn't recognize my phone. Is there any other way to back it up.

Not anymore. It should have a backup already though as iTunes does that anytime the phone is synced.

Should you end up replacing the phone you could restore to that backup.

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