They sold a carrier locked phone to me, originally sold in US by a American carrier. (Still network locked when I inserted other simcards).
Indeed I was testing this Z fold3 on wifi for a month, working fine.
After a month I found this phone was originally sold by an American mobility carrier in USA.
They bought this carrier locked phone and sold it to me by describing 'Unlocked', which make me not able to use it on any Canadian sim card.
I have been asking them for a week but so slow to fix this issue. Eventually, they wanted me to ship it back to you for any further actions, which I don't agree with it for another several weeks waiting and possible non-refund situation.
For this reason, I give them one star who didn't check the phone mobile network status properly giving a customer wrong information and huge difficulties on using a phone.

I was soooo super excited to have this unique phone--until I peeled the clear screen protector off of it (because it began to bubble--especially in the fold of the phone).

What Samsung DOESN'T tell you is that if you pull that plastic screen off the phone (when opened) your entire wide screen will go wonky and then eventually out.

This phone cost wayyyyyyyyyyyyyyyyyyyyy too much to not have a warning sticker regarding that flaw.

The ONLY redeeming thing about losing use of the wide open screen is that (once the phone is closed) there is a front side of the phone. It is very thing in width but you can still scroll/use your phone for the Internet, cell phone etc. as normal.

The OTHER messed up part about it is that Samsung would not exchange it (even for a refurb one) but kept offering me "discounts" on applying for another phone ( Samsung Fold 4).

Needless to say, I won't be buying this phone again (or upgrading).

Let me also add, I only got a few months usage of enjoying that beautiful, unique wide screen before it went wonky.

Not happy...

After trying many other types of smartphones and taking a long break from Android, my first Samsung device was the ill-fated Note 7. I was so impressed with that phone that despite the battery issues I preordered a Note 8 and later a Note 10. I have no real complaints for any of them, as each represented an excellent refinement of traditional hardware that offered the best smartphone experience available.

That refinement is finally reaching the Z Fold line, with some caveats. Let's not pretend that this is the best smartphone experience available; it's the same energy as the Note, but applied to something entirely different, and that's really the point. Samsung has taken a concept most people would have said was completely impossible as recently as a few years ago and made it not just work, but work rather well, to the point that if you buy this instead of a normal smartphone you can rely on it. That is impressive all on its own, and echoes the push to big screens that Samsung led many years ago which shaped the modern smartphone landscape.

So, why buy this phone? Rather unsurprisingly, if you find yourself doing anything that would benefit from more screen real estate but don't find it practical to have a tablet or laptop at hand, this makes a world of difference. This review is typed entirely on the Z Fold 3, much more comfortably than it could have been on my Note 10. Reading is also greatly improved, for both text and comics. It also offers a great deal more space to work with when drawing with an S Pen, and for playing games that benefit from the large square viewing area. It's also actually easier on the pocket than a Note 10 due to the tradeoff of width for thickness, and a little easier to use the left side if front screen one-handed due to its narrow profile.

Why might you steer clear of this one? If you need all day batter from your phone with heavy use and no ability to charge, and can get by with the smaller screen (or use a supplementary device like a tablet or laptop) then there's little appeal, especially when you can afford to get a better phone and better tablet separately for lower cost. This is also not a great device for video content given the prevalence of wide-screen ratios, which means you end up with black margins that make the video worse than it would be on an ordinary phone. You also can't use the screen-off memo from the Note series with the front screen, only the inside screen, rendering that feature far less useful. No removable storage is also painful if you like to carry a lot of content on your phone, and the cameras are passable, not top-of-the-line.

Bottom line: The Z Fold 3 is not a perfect device. I think more than anything else, I would have liked to have an included stylus and/or great battery life. But the quibbles are minor - the battery life isn't bad, and the stylus support is there albeit without onboard storage. The screen crease is still present, albeit inoffensive and usually unnoticed. And apps are still getting used to the form factor, which leads to some quirks. But that's about all I can say about the downsides - and again, for a fully functional device that can fold in half with the durability to be a daily driver, that is incredible.

I highly recommend trying one of these to anyone who stands to benefit from the versatility of the inside screen more than they stand to lose from the compromises mentioned above. The Z Fold 3 easily earns 5 stars not because it is a perfect phone, but because it is a marvelous remaining of what a mobile device can be.

I upgraded from my Z Fold 2 mainly for 2 reasons:

1.- S Pen capability on the Z Fold 3. Since this was a feature that was not available and for me a missed opportunity from Samsung to include on the Z Fold 2.

2.- IPX8 Water Resistant. This also was a missed opportunity on the Z Fold 2, which made me leave my Z Fold 2 for "At Home" use exclusively.

Other than the above mentioned features, the Z Fold 3 resembles mostly all the other features on the Z Fold 2. Obviously you have the new Snapdragon 888 and 120 Hz cover display which for me makes little to no difference on performance compared to the Z Fold 2; so technically there is an improvement but on a day to day use, is not noticeable.

The main display UDC is by far gimmicky, however it is much appreciated that Samsung considered it for this version of the Z Fold series, although I know that Samsung could've done much better than only 4 mp on it.

My only complaint on the Z Fold 3 is battery life. No matter how efficient the Snapdragon 888 might be energy wise, the fact remains that both displays are 120Hz refresh rate now, plus the UDC which powers also the extra pixels to blend in to what's on the screen, thus all the extra internal processes that take place in the background, does not justify that now the battery is only 4400 Mah, whereas the Z Fold 2 was 4500 Mah. In any case Samsung should left the 4500 mah battery capacity from the Z Fold 2 with the new Snapdragon 888 to make the battery life on par, or perhaps a bit better than the already above average battery expectancy of the Z Fold 2. As a result I find charging my Z Fold 3 more than I usually did my Z Fold 2, and that to me represents major burden.

Software wise, Samsung really hot a home run with One UI 3.1.1. this is by far the best iteration of One UI, polished to be efficiently applied to the Z Fold Series. This device is a Multitasking Powerhouse. Highly intuitive, and user friendly. The ability to have the app bar permanently pinned on your screen to have easy access to your most used apps, gives it the feeling of having a micro desktop computer on the palm of your hands. It does not feel sluggish nor laggy. Never thought I would ever give my 2021 M1 iPad Pro a break until I got to experience this One UI 3.1.1 on the Z Fold 3. Kudos to Samsung on a job well done!

Overall, I am satisfied with what Samsung has done on the Z Fold 3. Durability was improved, with IPX8, cover screen upgraded refresh rate, check!, slight lighter, check!, improved frame material, check!, S Pen capability, check!...Battery life, MAJOR FAIL