Yes, it's true. Why else would you have a mobile phone if not to take those on-the-spot photos :P
Here's a few I've taken over the last few months...
Trinity and I went to the park after dropping the car off at the mechanics. You don't take the camera out when you're going to the mechanics, right... but you do take your phone!
Here we were out shopping at the Marketplace. Why would I have a camera? But the phone was perfect for catching Trinity's enjoyment of a choc chip muffin when we stopped for a break.
And finally, a day at the pool. Adam never came with us, so it was great to be able to take a photo and send it to him so he knew what he was missing LOL