Samsung Galaxy Z Fold2 5G – the world’s best foldable phone

Samsung Galaxy Z Fold2 5G – the world’s best foldable phone

2.5Overall Score

Name: Samsung Galaxy Z Fold2 5G
Price (RRP): $2999
Manufacturer: Samsung

Where do you start with the Samsung Galaxy Z Fold2 5G? Is it a smartphone with a big foldable tablet screen, a second external screen, a powerhouse processor and a great camera? Or does it open a new category that defies conceptions about what a smartphone is and can be?

Yes, I am quite enthusiastic about this format. The more I use the Samsung Galaxy Z Fold2 5G, the more potential I see in it.

Why? Because the standard glass slab, the most economical way to deliver a smartphone, is so limited in comparison. The biggest impediment to productivity on a glass slab is lack of screen real estate.

It is a two-in-one – folded it is a 13.8-16.8mm thick phone with a 6.2″ screen and open it is a 6.9mm thin 7.6″ tablet. Oh, and it is not as weighty as I expected at 282g – about 60g (that’s 2 ounces) heavier than the best Android Glass Slab – the Samsung Galaxy S20 Ultra 5G (review here 4.7/5).

While everyone would love a foldable, the device is for the select few that can afford $2,999. Yes, you can lease it, or trade-in an older Galaxy phone but the bottom line is that it is Samsung’s effort to inspire and show technological leadership.

Enough of the Samsung Galaxy Z Fold2 5G adoration.

The full technical review is below but here is the spoiler now.

As an Android phone, it does nearly everything the benchmark Galaxy S20 Ultra 5G (or Note 20 5G except a stylus) do except micro-SD memory expansion.

As a tablet, it has successfully addressed the minor issues of the Fold Z (Version 1). It now has a full external screen, a better fold mechanism, it is over-engineered and specified (12/256GB).

It has an interesting 12+12+12MP rear camera. But it is not near the capability of the Note20 Ultra or the S20 Ultra camera.

Samsung’s tweaks to Android make tablet and fold a little less clunky.

It gets out recommendation.

Samsung Galaxy Z Fold2 5G Model SM-F916B (ZNAXSA)

  • Australian website here
  • Manual here (it is a PDF so check downloads folder)
  • Price: $2999
  • Colours: Mystic Bronze and Mystic Black
  • From: Samsung online and Samsung Pitt Street Mall store Sydney, JB Hi-Fi, Bing Lee, Harvey Norman (and other Doymane stores), Catch.com.au (Wesfarmers owned)
  • Elevator pitch: phone, phablet, tablet.
  • Warranty: 2-years
  • Country of Manufacture: Not China. Likely South Korea or Vietnam
  • Samsung is a South-Korean global supplier of smartphones, tablets, TVs, home appliances and more.
  • Other Samsung news and reviews here

Grey market – no Australian warranty

We have named and shamed the major grey marketers here. If you are going to spend this much money, get a genuine ‘Made for Australia’ model. Besides the Australian eSIM’s IMEI will only first activate on an Australian network. Note that the W21 dual sim 512GB model and SM-F916N are not for Australia.

First impression – pretty slick

The review unit is Mystic Bronze. For some reason, my wife loves, but it does not resonate with me. But then it is more attractive than boring Mystic Black. Looks-wise it is similar to a thick Note 20 Ultra.

The first thing you see is a large spine accounting for 16.8mm folded thickness. The front screen is tall and narrow. It has a 25:9 ratio, so it is not for 16:9 movies and video content. One-handed use on this screen is impossible, but there is something quite reassuring, solid, holding the phone by the spine in your left hand.

The rear camera block is quite elevated with three 12MP optically image stabilised (OIS) lenses are in perfect traffic light symmetry and a single LED flash.

Like my Galaxy, S20 Ultra 5G camera block this review model edges are starting to show some ‘rubbing’ wear. It is there to protect the lenses, and I suspect that a cover which I estimate will add another 60g would be a great idea.

Open up the Fold, and it is all-screen although technically its 88.6%C screen-to-body ratio as there is a solid but thin alloy frame around the edges.

Screens – there are two

Size Fold: 7.6″
External: 6.2
Type Fold: Dynamic AMOLED 2X, 120Hz (Adaptive mode – otherwise 60Hz) with right top O-hole
External: Super AMOLED 60Hz
Resolution Fold: 2208 x 1768
External: 2260 x 816
PPI/Ratio Fold: 373ppi and 11.2:9 ratio (3.73:4 = close to the old 4:3 TV screen)
External: 25:9
Colour depth
Brightness

Contrast
Delta E
RGB adjust
White Balance
RGB
HDR10+
External

Both: 16M
Fold: About 450 nits typical fairly evenly distributed (no hotspots)
It will reach 700+ max auto nits in a small screen segment
Both: ∞:1 – Black: 0 cd/m2
Fold: 2.25 (<4 is excellent)
Fold: Vivid (135% sRGB), Natural (100% DCI-P3 most accurate)
Fold: Cool to Warm 6100-8200°K
Fully adjustable
Fold: Yes. External: No
The external display defaults are accurate and colourful
Daylight
AOD
Dark mode
Blue light
Edge screen
Accessibility
Both: Excellent
External: Yes
Yes
Yes
Fold: Yes
Fold: All enhancements
DRM INFO Fold: HDR10, HDR10+, HLG
Widevine L1
HDCP 2.3
Note that there is no digital output of DRM content to an external screen so it should stream HDR content from any source
Gaming Fold: 10ms G-T-G
Samsung Game Booster toggle to force 48fps refresh rate for some games>
You can buy a separate clip-on controller
Protection Fold: It is a foldable ultra-thin glass screen that requires care
External: Corning Gorilla Glass Victus 7 (2m drop-resistant)
Both have a pre-applied plastic film that will lift over time.
Face ID 8/10 positives

Let’s start with the Fold.

It is colour accurate, has adaptive 120Hz (usually 60Hz) refresh, and the almost 4:3 aspect seems to be compatible enough although we noticed side cropping on a full-screen landscape video.

Independent tests show (see video at the end) it is not as scratch resistant as Gorilla Glass (any version) and Samsung warns to take care as fingernails could scratch it. As it has a plastic screen protector – touch is slightly draggy – not as smooth as glass.

The warning is common sense, and anyone that mistreats a $3,000 object is at fault.

The key here is the extra real estate allows for better multitasking. There is quite good palm rejection. The only downside is the split keyboard on most apps. It takes quite a while to master as half the letters are on each side. I am sure there are apps to address that.

The middle Fold is barely noticeable in use – you can feel a small indent channel down the portrait screen.

Magnets hold the Fold together. The screen can be full, as two half-height or even as an L-shape (Flex Mode) for selfie video.

The external screen is the one you use most of the time for phone functions. It is very ‘skinny’ at 25:9 including an almost unusable onscreen keyboard.

While we will refer to IP rating (water and dust resistance) later, this has no formal rating. I am sure it is splash resistant, but pocket dust will inevitably make its way into the fold hinge.

Processor – the best in 2020

SoC Qualcomm SD865+ 7nm
1×3.09GHz, 3×2.4Ghz, 4×1.8Ghz
GPU Adreno 650 Compute Open CL: 3574
Game use Will handle almost any game at 60fps. There are no issues with the screen format. But while its capable of games and it has a 120Hz adaptive screen, we can’t recommend that due to the possibility of damage during vigorous gameplay.
RAM 12GB LPDDR5 but about 6GB free
Storage 245GB UFS 3.1 (approx. 216 avaialable)
Androbench Mbps sequential read/write
Internal test:
1627.65/738.89 (Entry-level Desktop SSD speed)
External:
The interface is USB-C 3.2 Gen 1 (5Gbps or 625MBps half-duplex). Drives must be formatted exFAT

Orico iMatch 1TB SSD USB-C 3.1 Gen2 (10Gbps) 218.37/210.6 (about maximum data transfer rate)
WD My Passport SSD 2020 USB-C 3.1 Gen2 (10Gbps) 207.98/216.15 – ditto
OWC Envoy USB-C 3.1 Gen 1 256GB SSD Flash Drive 213.42/209.99 – ditto Lexar UBC-C 3.0 64GB Flash Drive 79.9/54.99
[email protected], AAC stereo recording produces a 70Mbps (8.75MBps), so you will have no issue recording straight to an external SSD or even a USB-C 3.0 flash.

micro-SD No. USB-C OTG allows froe XFAT disks to 2TB
Ultra-wide-band CS40L2X chip. It is like ANT+ that allows you to find other nearby compatible smartphones and devices. It is smart enough to securely control compatible car and door locks as it has precise location, spatial and angle of arrival capability. Similar in function to Apples new Ultra-Wide-Band H1 chip Samsung has a techy explanation here.
Geek
Bench 5
Single: 978
Multi: 3177
There is no faster SoC available in 2020
Throttle
15-minute
Max: 232,685 GIPS, Average: 211,277, Minimum: 195,920
14% loss over 15 minutes
The external temperature reached 42° on the Fold and 37° external

This has the current fastest SoC and all the go-fast bits.

The throttling and slightly higher external heat are due solely to thermal design. It is not bad, but it is not for continuous 100% load either. In any case battery life would be measured in a scant few hours.

In some ways its overkill for this device. It helps me to see why some brands are using the SD765 as thier 2020 flagship processor.

Comms – PASS

Wi-Fi Wi-Fi 6 AX, HE80, MIMO (Used Qualcomm QCA6390)
Signal Strength 5Ghz – distance from ASUS AX1100 router
– 2m: -36 dBm/1.2Gbps (excellent)
– 5m: – 63dBm/663Mbps
– 10m: -71/266Mbps
Bluetooth BT 5.1
A2DP, AVRCP, HSP, HFP
Supports both audio and handsfree
GPS Dual with <4m accuracy perfect for turn-by-turn navigation at speed
NFC PN547 works with any contactless reader and NFC tag as well as Mag Stripe and Samsung or Google Pay
USB-C 3.2 Gen 1 5Gbps half-duplex (expect maximum 200MBps data transfer)
DeX Desktop experience support also includes data transfer to PCs
If you have a DeX station, you can attach USB devices like a mouse/keyboard or use BT devices instead. It can also act as a touchpad. You can use USB-C to HDMI adapter for a monitor (1080p60Hz)USB-C 3.1 Alt DP to a computer or TV (up to [email protected])Over Wi-Fi (not all devices will work)
Windows Link You can connect your device to a Windows PC to instantly access your device’s data, such as photos or messages, on the computer. When calls or messages come in, you can receive them on the computer.
Smart View A form of [email protected] using Miracast
Sensors Accelerometer and Gyro combo LSM6DSO
Barometer
Fingerprint Sensor on the power button
Geomagnetic Sensor, Hall Sensor, Light Sensor, Proximity Sensor

My main gripe is the combo LSM6DSO Accelerometer and Gyro. I know this widely used, but it makes screen rotation and accidental rotation on any device using it a damned pain. If you put it on a desktop, the portrait screen nearly always swaps to landscape or vice versa. The cure – turn off auto rotation.

Otherwise, it has excellent Wi-Fi data transfer speeds.

LTE and 5G – its a city phone

SIM Singe nano sim and eSIM
eSIM must be activated in Australia first before international use
SIM can be for calls, data or texts
Ring tone Dual ringtones
Support VoLTE – carrier dependent – generally yes
Wi-Fi calling – Yes
UL (Mbps)
DL (Mbps)
Ping (Ms)
39.5
6.9
30
LTE Band 1, 2, 3, 4, 5, 7, 8, 12 ,13, 17, 18, 19, 20, 25, 26, 28, 38, 39, 40, 41, 66
5G N1, 3, 5, 7, 8, 28, 40, 41, 77, 78
We could not test 5G reliably.
Test -104 dBm/63fW on band 28 4G LTE in a 3-bar reception area (average)
Found next tower at -106dBm/31fW.
Occasionally found the third tower at -117dBm/7fW

LTE Signal strength was all over the place – from 102-119dBm. We doubt that it is due to antenna design – all tests are laying flat on a glass table. I suspect that it is more Telstra’s fault than the Fold2.

We can confidently say it is more a city/suburbs phone than for regional and rural use.

5G is sub-6Ghz only, and while it covers most global bands, the lack of mmWave support limits its use in the US and China.

Battery – one day at best

We normally test at 120Hz (forced) and 60Hz (default). This device only offers Adaptive rates, so it is hard to tell what speeds it is testing at. We estimate that the main battery impact is on video loop where it gets 16 hours at 60Hz and reduces to about 13 hours at 120Hz.

And then there is the issue of mixed-use. What percentage of the time can you just use the external 60Hz screen?

Battery mAh 4500mAh rated typical dual-cell battery
2345 and 2155 mAh over both halves of the device.
Reported 4365mAh which is not unusual.
Charger PDO: 5V/3A/15W, 9V/2.77/25W
PPS:3.3-5.9V/3.A OR 3.3-11V/2.25A Qi/PMA wireless: 5V/3A/15W at approx. 73% efficiency (11W deliver)
Wireless reverse charge: 5V/.9A/4.5W at approx. 65% efficiency.
Care: The charge coil is not in the centre of the back. It is in the bottom third. Alignment on a charger affects efficiency.

Test with supplied charger set to fast charge
30% at 30 minutes
60% at 60 minutes
100% at 120 minutes You can use any USB-C PD compliant charger

Tests Video Loop test:
60Hz 1080p/50%/aeroplane mode – 16 hrs (claim 18)
120Hz as above – 13 hrs
60Hz External – 25 hrs
Typical use 4G, Wi-Fi Test
Fold adaptive – 9-10 hrs
External – 15 hours
MP3 music test: 50% volume played from storage – 24+ hrs (claim 83)
100% load Battery drain – 3 hrs
T-Rex (unsure of refresh rate) – 238.8 minutes (3.98 hours) 6643 frames
Drain screen off: .3W (about 15 days)
Drain screen on: 2.8 W or 24 hours
Maximum drain; 10.5W

Because of the three screens and mixed-use, we estimate that it has a maximum of one day if you favour tablet mode and close to two days for external mode.

But it has a fairly high screen-off current draw that means it will only last about two weeks on standby or three hours at 100% load.

We tested Qi charge with a Belkin 15W charger. It should reach 5V/3A (less Qi efficiency factors), but the best we could get was about 10V/1A or 10watts.

When you look at the fast charge of the S20 Ultra 5G (65% in 30 minutes and 100% in 60 minutes), and the OPPO Find X2 Pro (95% in 30 minutes and 100% in 36 minutes) you wonder why Samsung took the safe route. Well, at least it beats the iPhone 11 Pro Max for speed (that takes over 2 hours for a full charge).

Sound – it is very good

Speakers Stereo matching speaker top and bottom – landscape orientation means the speakers point up and down in portrait mode.
AMP As in Note 20, It uses two Cirrus Logic CS35L41 top-of-the-line D-Class amps that output 5.3W each at 1% THD. These have integrated DSP and speaker protection. Interestingly these are two mono amps to make stereo, so we assume there is some software balancing to match the top and bottom speakers.
Hi-Res It will sample at 16,24 and 32-bits at 44.1, 48, 88,2 and 96kHz (use developer options to select)
BT codecs Codecs are SBC (standard), LDAC (Sony), aptX/HD (Qualcomm), ACC (Apple) and Samsung Scalable (requires Samsung device like Buds Live). You can select different or all codecs in developer mode)
Audio Playback MP3, M4A, 3GA, AAC, OGG, OGA, WAV, WMA, AMR, AWB, FLAC, MID, MIDI, XMF, MXMF, IMY, RTTTL, RTX, OTA, DFF, DSF, APE
Dolby Atmos Dolby Atmos for normal use and games. It decodes 5.1.2 (or higher) to the two speakers. It does not add any height channels. Dolby Atmos content viA BT or USB-C cabled headphones (it has an inbuilt DAC) has a slight sense of spatial sound.
Presets EQ pre-sets can adjust most frequency bands by +/-10dB. These include normal, Pop, Classical, Jazz, Rock and Custom.
Sound Stage In landscape mode, it is a little wider than the device.
Video MP4, M4V, 3GP, 3G2, WMV, ASF, AVI, FLV, MKV, WEBM
Will downscale [email protected]
By default, it captures videos in AVC format with a two-channel, AAC, 48 kHz audio stream producing a 70Mbps stream.
Mic 2 with Acoustic Overload Point to minimise noise
Handsfree Loud and clear – better than most
3.5mm No – USB-C AKG earbuds provided and of reasonable quality and frequency response.
Tests dB
Anything over 80dB is excellent
Media – 76
Ring – 76
Alarm – 76
Earpiece – N/A
Handsfree – loud and clear
While we would have liked to see 80dB or more but this is good clean, distortion-free sound.
BT headphones Our reference Sony WH-1000xM4 in SBC, AAC and LDAC modes and provided good clear sound and plenty of volume. These headphones don’t support aptX/LL, but in tests with the Sennheiser PXC-550 II, it was superb.

Sound quality – perfect for a tablet

Deep Bass: 20-40Hz No
Middle Bass: 40-100Hz Building from 80Hz
High Bass: 100 to 200Hz Still building
Low-mid: 200-400Hz flat
Mid: 400-1000Hz flat
High-mid: 1-2kHz flat
Low-treble: 2-4kHz flat
Treble:4-6kHz flat
High Treble: 6-10kHz Dip to avoid harshness
Dog whistle: 10-20kHz Flat to 15kHZ and a gradual drop to 20kHz
Samsung Galaxy Z Fold2 5G

This is almost warm and sweet – perfect for music and movies. The pre-sets allow you to move it slightly towards bright vocal (good for clear speech and podcasts) or balanced.

Both speakers are well-matched with a very slight bias towards the bottom speaker (right in landscape)

Build – engineering marvel

Size/Weight Folded: 159.2 x 68.0 x 13.8-16.8
Open: 159.2 x 128.2 x 6.9
282g plus charger/cable and case if used
Colours Mystic Bronze and Mystic Black
Build Fold Glass: Ultra-thin Glass
External: Corning Gorilla Glass Victus
Frame: Alloy
Back: Gorilla Glass 6 for Qi wireless charge
IP No dust or water ingress protection
Magnets The screen is secured closed by magnets in the frame. These may cause issues with mag-stripe cards.
In the box 25 W charger
USB-C to USB-C cable
USB-C AKG earbuds
Samsung Galaxy Z Fold2
Samsung Galaxy Z Fold2
Samsung Galaxy Z Fold2

It is a solid device – never once did I feel it was fragile. But its deceptively easy to drop in one-handed use or when opening. Take care.

I really think an external grippy case would be a good idea, but that is going to add another 60g or so to an already heavy device.

After two weeks of use, the pocket dust started to become evident around the screen edge. I have not used it enough to know if this is going to be an issue. I usually place the phone in my front side left pocket with a couple of folded tissues. Keys or any other objects in that pocket are a no-no.

And this review model does have some very minor screen scratches noticeable only with a magnifying glass.

Unofficial estimates are that the bill of materials is close to US$700 compared to the Galaxy S20 Ultra 5G at $549 an iPhone 12 Pro Max At US$490.

Android 10 with 11 and 12 to come

Android Google Android 10
Security patch date: 1/12/20
Update: Android 11/12 and 13 likely and three years security patches
UI One UI 2.5
Google All standard apps, Google Lens and Assistant.
Security Samsung Knox allows secure folders and more to secure the device.
Integrated secure element (iSE) layer stores and manages users’ data separately from the operating system. Includes a physically unclonable function (PUF) – a digital fingerprint, that generates an unclonable key for data encryption. This is similar to Pixel Titan M and Apple T2 chip.
Side Key Still dedicated to Bixby
Bloatware Mostly Samsung productivity and utilities.
Facebook can be easily uninstalled.
Update Policy Assume one OS update. Security patches should come
Security Fingerprint on the power button
FaceID
Accessibility Voice Assistant
High contrast theme, font, keyboard
InternetColour inversion, adjustment
lensMagnifier window
WidgetSound detectors
Hearing aid support
Left/right sound balance
Mono audio
Mute all sounds
Live Transcribe/Caption on Android
Amplify ambient sound
Universal switch
Assistant menu
Interaction control
Touch settings (Tap duration, Ignore repeated touches, Touch and hold delay)
Mouse and Physical keyboard (Click after pointer stops, Sticky keys
Slow keys
Bounce keys
Direct access
Flash notification

For the most part, the One UI has made it quite seamless to use three screens (although only the front or Fold can be active at one time. What you see on the front can flow to the opened Fold.

It has everything you could want.

Missing – no deal breakers

Micro-SD While USB-C 3.2 Gen 2 gives good OTG speeds its not as convenient as a microSD for large files
IP rating Possibly a deal-breaker – Note20 or S20 for that
Headphone
Jack
No issue – USB-C
mmWave Not a huge issue here. Australia won’t have mmWave for consumer use for some years.
A smart phone cannot do this

Camera – generally a good all rounder

Samsung markets the rear camera as three 12MP cameras. But as you can see in the table below, there are three different sensors plus two identical 10MP selfie cameras. Why the magic mix? Each does different things, and overall it works.

One interesting thing – its overall shape and size precludes the use of a selfie-stick or tripod adapter. But you can use Flex mode to expose the three rear cameras or use the internal selfie.

Flex mode allows a preview of the shot and access to the gallery.

But as DOXOMARK has done a full camera review, we will defer to their expertise. They score it at 109, and it is easy to see why it is a way off the Galaxy S20 Ultra 5G (126), Note20 Ultra (120) and even the S10+ (113).

Why? The three different 12MP sensors are great for point and shoot daylight photography. Where they let the team down

  • Bokeh (no dedicated depth sensor)
  • Night mode (noise and artifacts)
    May get confused over which sensor/lens will take the best shot
  • No wide-angle lens (ultra-wide or telephoto)
  • And the OIS telephoto delivers good 2X optical but not great 10s hybrid digital zoom

Interestingly these are largely AI and software issues, and we may see the camera creep up a few points soon.

Still, as I like to point out anything over 100 points is pretty good, and its score puts it well ahead of the iPhone XS Max (106) and Pixel 4a (111).

Samsung Galaxy Z Fold2 5G camera specs

Camera Primary
12.2 MP
Ultra-wide
13MP
Telephoto
13MP
Selfie
10MP (2 – identical on external and inside O-hole)
Sensor Sony IMX555
Delivers 12MP
Samsung SK3L6
Delivers 12MP
Samsung SK3M5 Sony IMX374
delivers 7.1MP cropped
Lens Not specified
Focus Dual Pixel
PDAF
PDAF PDAF
Smart WDR
Dual Pixel
PDAF
Aperture f-stop 2.2 (test software reports 1.8) 2.2 2.4 Same
Pixel size um 1.8um 1.12 1.0 1.22
FOV° and cropped 83° (71.9)
26mm
123° (104.3)
12mm
76°
52mm
80° (61.5)
Stabilisation OIS
Plus Qualcomm EIS video stabilisation
No OIS No
Flash Single LED Screen fill flash
Zoom Optical 2X
Hybrid Digital 10X
Video Max [email protected] HDR10+ video [email protected]
Features HDR HDR

Daylight, outdoors

Indoors Office Light (400 lumen)

Low light (room <100 lumen)

Not a bad shot but lacking in colour and details
Night mode gets a little more from the shot but its a long way from the S20 FE below.

Selfie

Dual preview is possible in Flex Mode. Screen fill is available with the tablet selfie. Colours are fine.

Bokeh

Bokeh is a weakness a you first select Live Focus, take the shot and then post process it to your needs.

Macro

There are no macro settings but PDAF works very well.

Video

Video quality to [email protected] is excellent given both OIS and EIS stabilisation. It suffers in low light.

GadgetGuy’s take – Samsung Galaxy Z Fold2 5G

It’s the second version of what promises to be a long of Galaxy Z Folds. It is very good too.

Despite a few foibles, it is hard to fault and Samsung address any issues promptly. Software updates and security patches are excellent.

Those foibles are a folding screen that needs care, no IP rating and no micro-SD storage. Yet they are no deal-breakers.

I ended up using the external screen most of the time and the fold in Flex mode for Duo and more screen real estate.

Do you need a Galaxy Z Fold2? Well, it is nice but not a must-have. Just like the Note 20, S-Pen is nice but not a deal-breaker. The S20 Ultra and its periscope zoom have a superior camera offering.

Here is a JerryRig teardown

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Rating

There is a conundrum. Do you rate it as a tablet with phone benefits or a phone with tablet benefits? Neither it is a hybrid and a new category.

I would love to give it 5/5 but I can’t. Why? Because the Galaxy Note 20 Ultra gets 5/5 and the Galaxy S20 Ultra 5G gets 4.7/5. These are for entirely different audiences.

But its certainly up there, even if we can’t afford it.

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