No, you cannot get the Premium Dynamic Navigation System on the 2018 Camry Hybrid XLE. ONLY on the 6-cylinder XLE and XSE cars. I DID special order my Camry, and was researched all myself. I certainly was not going to take no, but I had to.
There is even a YouTube from a dealer that specifically States you MUST get a 6-cylinder to get the dynamic navigation system.
This was a crazy 2018 marketing decision (onboard nav for a V6 but not the top of the line Camry Hybrid XLE). I noted this to my dealer and then online in various places that I hoped Toyota would see. Whatever actually happened, you can get the onboard (dynamic) navigation in the 2019 Hybrid XLE. I have one sitting in my driveway that I bought last Wednesday. I did this after a 3400 mile "test drive" in my son's 2018 Hybrid XLE, where we used Google Maps on a Samsung phone in a cupholder mount. In both cases, we don't use Entune at all. I had a 2015 Camry Hybrid XLE and the 2019 Nav software is definitely improved and has more usability and features. I prefer it to Google Maps, but I can also see how some would like Google Maps as well or better - it's simpler to learn and use. So 2020 will hopefully repeat the 2019 availability of the onboard nav and add Android Auto to give people choice.
Back to the original question: up until last Wednesday, my 2015 Camry Hybrid XLE was the best car I ever owned for my needs. My son's 2018 CHXLE was the superior car except Toyota provided Entune 3.0/Scout Pilot instead of the 2015's onboard navigation. I bought the 2018 in spite of this because of the vastly improved safety features which I wanted my son to have as a relatively inexperienced driver. As a phone-centric youngster, my son was fine about using Google Maps in a mount, as was I on the recent 3,400 mile drive. But he did admit yesterday that the 2019 onboard nav system is nice. So now, with the nav system and adaptive headlights being the only real differences I care about between the 2018 and 2019, the 2019 is the best car I've ever owned. I ignore Entune because it really doesn't bring anything to the table that the nav system, HD radio for traffic and weather and the Sirius XM system don't already provide. I don't need the car as a hotspot because I'm on the Verizon system anyway.
What I appreciate beyond daily driving, somewhat in order from most to least:
1. It's a decent-sized sedan and I love the gas mileage. I thought very seriously about the LE but had just a few things that were in the XLE only.
2. The mpg increase comes from two engines and the battery, which means more horsepower than a non-hybrid Camry. Again, a big plus. It's fun trying to learn the battery/gas cycle, but when I want acceleration, it's there.
3. The Heads Up Display. I quickly became addicted to having my speed, speed limit, lane tracking, and cruise control info on the windshield. After going through a driving rainstorm in Florida and (recently) rain for a whole day and sleet the next day, it was VERY comforting to be able to watch the road like a hawk while always knowing exactly how fast I was going. The HUD information is repeated elsewhere, too. But it is simultaneously cool and a major safety feature to me, though I don't think Toyota really markets it that way.
4. The overall comfort - not a luxury car, but my family and I spent 12 hours in it in one day recently and we were all fine with the ride and the seats and climate control. If you need plush, this isn't it. But I like the interior.
5. The safety features together are really impressive, and much more intuitive and unobtrusive than I expected. I was prepared to hate the dynamic cruise control. But they have really nailed it from my point of view. I recommend literally playing with the safety features somewhere if you can so you don't flinch if the car squawks at you in an emergency. Braking fast was recommended only twice in some 3800 miles of driving, but on point at those two times. My wife and son love the Bird's Eye camera, and it's growing on me as well.
6. This suite of safety features was why we got the 2018 and I expected to turn a lot of the features off. I have ended up leaving them all on because they work well for me. I've done lots of software development and Toyota has done a solid job with the details of cruise control and the like.
7. It's nice to have the full-size trunk back. The 2015 Camry Hybrid gave up a few cubic feet to the battery.
8. Others will want and/or like things I haven't mentioned, like CarPlay and Alexa. I considered getting an LE, buying a cheap iPhone, adding a line to my Verizon account and then using the phone just for navigation in the car. Would still have been a fair bit cheaper than the Nav package. But the Nav package had other things I wanted.
I identified two major issues with the 2018 to the dealer and Toyota: no onboard nav, and a smaller gas tank than the 2015. Even with the better mileage, my 2015 could go farther on one tank than the 2018 XLE, but not by much. A 2018/19 LE might have a longer range than the 2015 XLE. Ultimately, this range thing feels pertinent only on trips of 450 miles at a shot or more. During normal use, you visit the gas station less often in the hybrid models, and that turns out to be another feature you may appreciate. I think it would be nice if Toyota added a gallon to the tank size next year, but it's not a showstopper or even noticeable unless you came from a hybrid with a bigger tank.
Bottom line: unless there are unexpected mechanical issues in these cars, I fully expect this XLE with nav to be the best car I've owned to date. It's loaded with features, though, so your satisfaction will vary depending with how much you really appreciate those features vs the money they cost you. I'm happy with the balance. But again, the LE almost got me with the better mileage and cheaper price vs the higher-end options like the HUD and the onboard Nav system.
To me, it is nice to be able to have the fully functional car without having to use my phone every time I drive. I don't take or make phone calls in the car, so I can't speak to that. But while driving my son's car, I did get notices of incoming calls and text messages, and I could see the car was actively monitoring for me. In that car, I had the phone doing Google Maps, so the car was also connected to the phone.