Samsung Galaxy S 2 (International) Review - The Best, Redefined
by Brian Klug & Anand Lal Shimpi on September 11, 2011 11:06 AM EST- Posted in
- Smartphones
- Samsung
- Galaxy S II
- Exynos
- Mobile
Inside SGS2
There have been a number of teardowns of the SGS2, and for the most part usually there isn’t a need to open up devices unless the FCC photos don’t suffice. This time around I still have a number of questions about what component choices had been made for the SGS2, so it went under the screwdriver (and emerged unscathed) just so we could get a glimpse at the goods.
SGS2 comes apart easily enough, with a few philips (no Torx bits) screws on the back and then a couple prods with a plastic tool to get the snaps off. Construction in this regard is very similar to the original SGS. After that, you have access to the PCB, backside, and frame.
You can see how SGS2 achieves its thinness by looking at the layout. The PCB doesn’t run underneath the battery - the majority of device thickness is defined by the SAMOLED+ panel plus battery thickness.
In addition, the SGS2 locates the cellular antenna at bottom in a modular speaker plus antenna module that snaps in and out of the plastic backside. The depth of SGS2 at its thickest seems governed by this speaker and its resonating chamber. Off to the other side is the bottom microphone, cellular feed cable, and gold contacts for getting that connected to the silver antenna.
There’s another second antenna to the opposite side of the module, which is for Bluetooth and WiFi.
If we turn our attention to the PCB we can see the rest of SGS2’s interesting bits.
The EMI cans thankfully snap off easily, and underneath we can see right next to the microSD card slot is the Infineon/Intel X-Gold 626 HSPA+ (HSDPA Cat. 14 - 21 Mbps / HSUPA Cat. 7 11.5 Mbps) baseband.
On the opposite side is the Audience 1026 noise cancelation IC, MAX8997 PMIC, and Yamaha YMU823 audio codec.
On the same side further down is the GPS that SGS2 uses, which is a SiRF GSD4T GPS. That particular die is absolutely tiny and difficult to photograph. More on the SGS2 GPS in a moment, however.
The other side of the PCB is much more interesting.
With the cans off, first we get a shot of Exynos 4210 with its PoP memory. This particular part has two mobile LPDDR2 die in the stack. Next to it, a Samsung combo NAND + DRAM part, with 16 GB of NAND and 64 MB of RAM, no doubt for the Infineon baseband.
Moving right is the Infineon Smarti UE2 RF transciever marked 5712, and the large IC below that marked RFMD RF6260 is a quad-band multi mode power amp which is a bit interesting. It works between 1710 and 1980 MHz, and 824–915 MHz, supplanting somewhat the need for individual power amps for each band.
Down on the long and skinny part of the PCB is a large package which I believe probably houses the BCM4330 WLAN module (more on that later), and next to it is a button cell battery, which seems curious.
Now remember that camera part I mentioned earlier? Well, at the top of the board you can see a ZIF slot, a relatively large IC< and then the camera module.
Compare these two, and it seems pretty obvious that this is exactly that same camera module from earlier, and most likely the large IC with Korea written on it is the Fujitsu M5MO ISP which controls it.
Also up at the very top is another gold connector which meets up with the SGS2’s third antenna, whose purpose is either for WLAN/GPS or another Rx finger for the cellular baseband.
The circular thing with a foam backside is the SGS2’s vibration motor, and other than that there really isn’t much more to talk about. Heat gets carried away from ICs through the EMI cans which double as heatsinks, and on the backside of the plastic back you can see a metal region and small thermal pad.
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numberoneoppa - Wednesday, September 14, 2011 - link
Guys, that mysterious notch you write about is not for straps, it's for phone charms, and it's arguably my favourite feature of samsung phones. (In korea, phone charms can be used for more than just cute things, one can get a T-money card that will hang here, or an apartment key).Tishyn - Wednesday, September 14, 2011 - link
I spend hours every week just browsing through reviews and tests comparing devices and vendors. This is one if the most interesting and most comprehensive review I've read for a veery long time.I especially enjoyed the rendering part and how it relates to the ultra mobile device market. Thumbs up!
milli - Wednesday, September 14, 2011 - link
Brian / Anand, why are you so reluctant to test chips from this company? ZiiO tablets, sporting the ZMS-08, are available for a while now and i'm sure Creative would send you the new Jaguar3 tablet (ZMS-20) if you guys would ask for it.The ZMS-20 has 26 GFlops ... faster than anything you've tested till now. The ZMS-40 coming in Q4 doubles that number!
I'm an old school IT technician and I for one don't understand your lack of interest. The GPU's in these chips are based on technology that Creative acquired with the 3DLabs purchase.
rigel84 - Thursday, September 15, 2011 - link
Just a quick tip: You can take a screenshot by pressing the power and home button at the same time.If you double tap your home button it will bring the voice talk feature.
While watching video clips just press the power button to disable the touch sensitive buttons.
Swipe your finger to the left on contact name to send him a message
Swipe you finger to the right on the contact name to dial the contact.
To see all the tabs in the browser just pinch inside twice :)
If you experience random reboots when you drop it on the table, or if you are leaning towards things or running, then try to cut a piece of paper and put it under the battery. It happens because the battery shortly looses connection to the pins. If you check XDA you can see that many people has this problem, and I had it too. I was experiencing many random reboots whenever I had it in my pocket, but after I pit a piece of paper below the battery they all disappeared.
A few things...
- GPS is horrible if you ask me. Unless I download the data before with gps-status then it takes ages. Mostly 15-30 seconds with 2.3.3 (no idea if the radio got updated in the release)
- Kies AIR is HORRIBLE! It's on pair with realmedia's real player from 10 years ago. Crash on crash on crash and sluggish behavior.
- I don't know whether it's the phone or not, but I've been missing a lot of text messages after I got my Galaxy S2. I'm on the same net, but along with the poor GPS reception I'm suspectiong the phone :(
- There is a stupid 458 character limit on textmessages, and then they are auto-converted to an MMS message. There is a fixed mms.apk on XDA (requires root) or you can download something like Go SMS Pro (still free) on the market, which removes this stupid limit.
ph00ny - Thursday, September 15, 2011 - link
OddI haven't seen any posts about the battery disconnect issues and if you've been browsing the xda forum, probably saw my thread about dropping my phone on concrete twice...
As for Kies AIR, i've used it twice and my expectation was low to begin and it wasn't that bad. Some things were definitely slow but it's a good start
-GPS for me has always been solid. I even used it on multiple trips in less than ideal location, not a single glitch even with shoddy cell reception.
ciparis - Tuesday, September 27, 2011 - link
I've been using Sprint's SGS2 (Epic 4G) for less than a day, but already there are some annoying points which I'm surprised aren't mentioned in this review:1) The digitizer lags behind finger movement.
In the web browser, when your finger moves, there is a disconnected rubber-band effect before the screen catches up with your finger. This is visible in the browsing smoothness video as well, and it's very noticeable in actual use. Coming from an iPhone 4, it feels cheap and broken.
2) Back/Forward navigation often ignores the previous scroll point.
If you spend some amount of time reading a page you arrived at from a link (it seems to be about 10 seconds or so), hitting back doesn't take you back where you were previously reading from -- instead of returning you to the page position where the link was, it drops you at the top of the page. This makes real web usage tedious. On the Sprint, the timing seems to be related to when the 4G icon indicates sleep mode: hit back before the radio sleeps and you are returned to the right spot. In actual use, this rarely happens.
3) The browser resets the view to the top, even after you've started scrolling.
When loading a page, there's a point in which the page is visible and usable, but it's technically still loading (which can go on for quite a awhile, depending on the page). It's natural to start reading the page and scrolling down, but typically the phone will randomly jerk the scroll back up to the top of the page, sometimes several times before the page is done. This is unbelievably annoying.
I suppose expecting an Apple level of polish prior to release is unrealistic, but Samsung seems hell-bent on positioning themselves as an Apple-level alternative; even the power brick looks like they took the square Apple USB charger, colored it black, and slapped their logo on it. The point being, they're inviting direct comparison, and it's a comparison their software team isn't ready to deliver on -- certainly not out of the box.
ciparis - Tuesday, September 27, 2011 - link
How are you supposed to use this phone if the keyboard is covering up the text fields, there's no "next" button to get to the next field, you can't see what you're typing, and there's no button to make the keyboard go away?Case in point: go to Google News and click on Feedback at the bottom of the page. There's no scrolling room at the bottom, so the keyboard obscures the fields; I was unable to send feedback to Google that their news site was opening every link in a new bowser window on a mobile phone (...) despite my account having the preference for that set to "off", because I couldn't navigate the form fields.
mythun.chandra - Wednesday, September 28, 2011 - link
Just realized there are no numbers for the Adreno 220 in the GLBench 2.1 offscreen tests...?sam46 - Saturday, October 1, 2011 - link
brian,please tell me which one of these smartphones is the best.i wanna purchase one of them so,pls help me in deciding.b1cb01 - Wednesday, October 5, 2011 - link
I love the green wallpaper on the first page of the review, but I can't find it anywhere. Could someone point me to where I could find it?