[Samsung Galaxy S20 / S20+ / S20 Ultra Questions & ] scaredy-cat:
Exynos experience

Before making your final judgement, give it a few days, while you opening a lot of apps, while everything is updating and caching, etc. There should be Galaxy Labs app preinstalled (I forgot if you should hit download inside Galaxy Store, to finalize install with a small download), opening Labs you should see a button to download app booster module. You may also try disabling some apps, or put 'em to sleep. Ultrasonic fingerprint reader tip: register your thumb two times for each hand, while rotating your phone and move thumb slightly towards bend point and then towards fingertip (over something soft in case you drop it while rotating, hehe), make sure to moisturize your hands, I have dry skin, and noticed scanner struggling with recognition. Some suggested registering both left and right thumbs at the same time, this may speed up unlock, though not sure how secure this is. Don't hold your finger too long, simply firmly tap and lift, and phone should unlock. Ultrasonic fingerprint reader is another disappointment, but people say it's more secure than optical scanner, anyway..

..about Exynos:

My phone is S20 Exynos edition. I never tried Snapdragon version, so I can't compare, but having experience with Exynos on its own, I have mixed feelings.

I was happy with it (and still kinda am), until I started gaming, and noticed thermal throttling, and poor performance in general. Again, maybe it's just the state of technology right now, and I'm demanding too much from such a compact package, but here are my observations:

• When in use, running something a little bit more demanding (sometimes even simple things, like running web browser, writing this post right now), phone always feels slightly or really warm to the touch, I frequently have cold hands, so this warmth is welcome, but during hot days, playing even lightweight games, heat made holding phone slightly unpleasant - very warm and slippery. It became slightly better after I believe June update, but is not fixed. On a positive note - it shows frame disapates heat quite well.

• Phone comes with a gorgeous display, but if you want gaming performance, you'll have to make sacrifices. I personally am willing to sacrifice resolution for refresh rate, in my opinion, once you go 120, 60 Hz looks too choppy, so I settled for HD+. It's slightly blurry compared to FHD+, but you quickly get used to it. WQHD+ in my experience is too demanding for anything but the most casual usage scenarious. So, Yes, gorgeous display, but because of slow system-on-a-chip, can't be used to its full potential.

• Poor emulation performance. I couldn't get

Wii

games on

Dolphin emulator

to run smoothly, some were sort of playable.

3DS

games on

Citra emulator

were basically unplayable - sideshow (haven't tried that many games), with phone overheating to the point when I started feeling slight burning sensation around metal frame.

• By the way,

PSP

games ran great on

PPSSPP emulator

, with a few hiccups here and there, but Exynos can handle PSP emulation.

• Random slowdowns. I'm still not sure if it's a thermal throttling or a software issue, but games sometimes would slow down, for no apparent reason, sometimes the phone feels just a little warm, but games starts to enter slideshow territory. Maybe something started running or updating in the background, but it shows there's not enough processing power, or bandwidth, not enough something for it to multitask well, like playing a video game and updating YouTube app seems like is too much (I'm not sure what causes those slowdowns, just speculating it's related to background activity, or maybe something else, read on..).

..Some suggested to stop game slowdowns you should disable Samsung's Game Launcher - done that, and Game Optimizing service, but for that you need Android debug bridge (ADB), never tried it, but guy said without root it finds ways to re-enable itself, also suggested package disabler, but I haven't looked into it yet. But in the end this will only solve random slowdowns.

Maybe I am just unlucky and my SoC is running hotter than average, I don't know. I also doubt temperature numbers this phone reports, because I tried Samsung's Perf Z module, and it showed moderate temp during gaming, I think it showed something around 37, yet phone felt Very hot. I don't have other ways to measure temperature, so maybe someone better equipped can do further testing.

This reply is already way too long, so I'm stopping here. Give your phone a chance, let it "settle", maybe you won silicon lottery. Also, Ultra is a larger phone, maybe it disapates heat better. Maybe you're not that demanding user, and will be happy in end, heck, as I said, I'm happy with my phone. My relative needs a new phone, so maybe I'll gift this one, and try something else, maybe Ultra? So Please, don't forget to share your experience with us ;)