<human>: Summarize the given text in a few sentences.

Obligatory didn't happen today, this happened about 1 1/2 years ago. 

So for Christmas 2013, my parents were nice enough to give me a brand new iPhone 5 as a gift, to replace my old dying 3GS. I kept the phone in perfect condition the whole time I had it, which I must say I'm pretty proud of because I'm notorious for smashing phones. 

Anyway, November 2014 comes around and I'm going to Jervis Bay for a marine studies excursion of snorkelling and kayaking (best excursion ever). After we've arrived and put our luggage etc in our cabins, I went with a group of friends down to the beach to have a look and take some pictures. I think of leaving my phone behind, as I don't want to lose/damage it but end up taking it with me in the back pocket of my shorts. We take pictures and whatever, have some fun, but as we're walking back up to the cabins I notice my phone is no longer in my pocket. I freak out, spending ages scouring the beach and cabin (just in case I did leave it there) for my phone but no luck. One kid even went swimming to look for it for me which was pretty nice of him. I had to spend the rest of the week with no phone, accepting that it was forever lost in the ocean. 

That's not all though, this also meant losing all my files and photos, including all the photos I didn't back up from my exchange trip to Japan two months earlier, which I now feel so stupid for not doing as soon as I came back to Australia. I also feel incredibly stupid for taking my phone to the beach in the first place, as this is not the first time I've done this; I lost a flip phone to the ocean in late 2012 because it was in a pocket way too small for it, so yeah. I'm an idiot.
<bot>: I stupidly took my phone to the ocean AGAIN and lost it in the ocean AGAIN, also losing a while heap of memories; there were about 5000 photos on there that weren't backed up.