Why is my dog afraid of iPhone sounds and vibration?

I have a 3 year old Female Maltese named Kiwi. About a year ago she started to act strange around my iPhone. Nothing scary happened previously. I didn't change the sounds or anything. When she s sees my phone everything is ok. But when she heard the typing noises (from texting or emailing), the ring tones, message tones and other app alerts, she gets real close to me (whether the phone is near me or not) and she ll start shaking then nudge on me. She will sometimes try to crawl behind my neck if IIm sitting. Sometimes she ll roll over onto her back. But she s always shaking and looks scared. This happens when the phone vibrates too. She will even lay her head on top of my phone, but as soon as it makes any noise or vibrates she changes. I've tried changing the sounds. Even changed them to earthly type sounds, real music etc. She still acts the same. We all have iPhones in the house and she acts this way around everyone s phones. Another note… She s not afraid of anything else. She s a "brave" and curious dog. She likes to investigate noises around the house and she s very much like a "leader of the pack". When I take her to the dog park she s not afraid of people, cars, thunder or anything. But she heard someone's message tone and ran right to me. People have said that she might have had a traumatic experience but IIm around her all the time and I never noticed anything. I don't know what to do.

Its got nothing to do with any traumatic experience, you know that. Its what people always say.
I wonder if you focus really hard on your phone, and that concentration freaks her out. Something important is happening and she doesn't know what it is or what to do.
If you are looking down it may look like you are scowling when you concentrate. Our energy changes when we use gadgets. If you have never seen your own face in your screen you won't have noticed it yet.
Years ago peoples dogs used to attack their land line phones when they answered it!

You can de-sensitize her to the phones, by finding her favourite game. Get her playing really hard, then have someone make their Iphone ring at the other end of the garden. If she reacts they're too close.
Repeat and next time have them move an inch closer.

You basically carry on doing this at random times and with different events and games, until she doesn't get bothered by them in the same room while she is eating or resting.

From your description its nothing close to fear.
She just associates the ring or music to you, thats why she comes to you when she hears it.Now, if you change your attitude around her when you know that your phone will ring, then she might start to build up uneasiness since you are feeling that way. Your dog is your mirror.