I got my first cell phone when I was 15 or 16. It was... decent. Full-fledged smartphones were already a thing at the time, but my parents didn't think I needed one of those, so I got a relatively basic phone. Not exactly the cheapest out there -- it did technically have internet connectivity, but I wasn't allowed to use it because we didn't have a data plan that would cover it. Still, at the time, I was just happy that I had a cell phone that I could at least text my friends with, since, by then, it already seemed like everyone else I knew had a cell phone, to the point where many people were shocked to hear that I still didn't have one. So, I was pretty excited to finally have a cell phone to text my friends with (instead of them having to text to my email anytime they wanted to contact me...), although, this phone didn't have a keyboard, so... I became pretty good at texting using a keypad for quite a while. o_o Although I still think it was a really stupid design choice that you had to press the button four times in order to type the letter S -- probably one of the most commonly-used letters in the English language (excluding vowels). Ugh...
After that, I eventually upgraded to a phone that did have a keyboard, which I was pretty excited about at the time. You know, the kind where you pushed the screen up and then there was a keyboard underneath? Yeah, I liked that. Pretty sure that was the kind of phone that most of my friends had by then, too (or at least... I think it was the kind of phone that most of my friends had when I got my first phone. I think a lot of them had moved on to smartphones by the time I got my 2nd phone...) . I don't remember when I got my 2nd phone, though, since apparently my memories of my early cell phones are surprisingly hazy, and, when I first started typing this, I mistakenly thought that my first two phones were actually just one phone... until I remembered that my very first phone didn't have a keyboard, so, yeah. In any case, I still couldn't use the web browser or download any primitive versions of 'apps' (if apps were even a thing on that kind of phone... which they might not have been), and so, like with my first phone, I could really only use it for calling, texting, and taking pictures, which is probably why the distinction between the two doesn't really stand out in my mind all too much. XD
I got an iPhone 5s -- my first real smartphone -- when I was 17, and it's the phone I still have to this day. And, despite the huge upgrade in what the iPhone is capable of compared to my previous phone... I actually didn't start making use of most of that other stuff until fairly recently. I still mainly used it for calling, texting, and taking pictures -- although the camera on this phone is way better than the one on my past two phones (I was seriously shocked by just how astonishingly sharp those pictures were in comparison o_o), and texting was a lot easier, too. I liked having internet access -- and the email app is convenient, so I got in the habit of using that and poking around forums fairly quickly -- but I still never had much of a desire to spend a ton of time online from my phone, especially since I already had a really nice laptop at the time.
I almost never downloaded any apps, either. And, despite having owned the phone for about two years now, I've really only recently started to explore everything this phone can do... And the majority of apps I have that didn't come pre-installed and that I actually downloaded, myself (which would still only be about... six apps) were all things that I downloaded within the past month or two. O_O
I have also never changed my iPhone's background or lock screen ever since I bought it. >.>