I have received this card yesterday and when I was doing the speed test , at any time I was not able even close to 20 MB/s (both read or write) even for large files. Also when I tried to register product on Samsung support site, It declined to identify the serial number, then I noticed that Samsung India imported it and pasted an additional sticker, when pulled that sticker , I have noticed another S.No and Model code which registered successfully on site but to my surprize it was showing that this product is already out of warranty. So it's clear that Samsung India is dumping their old stock which they were not able to sell in other countries. Earlies I was using SDisk class 4, 8 GB card and that too was giving upto 12 MB/s during read and 6-8 MB/s during write. So can say this is just OK OK product as there is no way that you will be able to get UHS-1 speed on your existing mobile / tablet.

I bought 2 cards at the same day. One Samsung for my S4 and one Sandisk for my friend's S3. After I got them I ran many tests with pc (crystal disk mark) , phone (S4, sd tools) and a manual test of transferring 2 GB folder contains small JPEG pics). Samsung won in every tests. It was way faster in both sequential and random speeds than sandisk. Samsung was always exceeding the class requirements but sandisk disappointed many times. Here are the results Samsung 16 GB MicroSD Plus Class 10 Crystal Disk Mark 3.0.2 5 X 50 MB Sequential Read : 20.03 MB/s Sequential Write : 16.48 MB/s Random Read 512KB : 19.92 MB/s Random Write 512KB : 15.65 MB/s Random Read 4KB (QD=1) : 5.348 MB/s Random Write 4KB (QD=1) : 2.357 MB/s Random Read 4KB (QD=32) : 6.146 MB/s Random Write 4KB (QD=32) : 2.449 MB/s SanDisk SDSDQUA-016G-U46A 16 GB Ultra Class 10 UHS 1 Crystal Disk Mark 3.0.2 5 X 50 MB Sequential Read : 22.62 MB/s Sequential Write : 10.85 MB/s Random Read 512KB : 22.24 MB/s Random Write 512KB : 2.383 MB/s Random Read 4KB (QD=1) : 4.159 MB/s Random Write 4KB (QD=1) : 0.536 MB/s Random Read 4KB (QD=32) : 4.190 MB/s Random Write 4KB (QD=32) : 0.592 MB/s Results from Phone (S4, SD tools) Samsung 16 GB MicroSD Plus Class 10 Write Speed: 21.9 MB/s Read Speed: 37.3 MB/s SanDisk SDSDQUA-016G-U46A 16 GB Ultra Class 10 UHS 1 Write Speed: 8.4 MB/s Read Speed: 31.1 MB/s So it seems Samsung plus class is better for both app and media performance than Sandisk Ultra. So I recommend it over sandisk.

It's really better than Sandisk and Sony class 10 memory cards. I had bought three 16 gb sd cards of class 10 and samsung wins the competition in every race the writing speed of samsung sd was 11.5 mbps , while sandisk and sony were only able to get 9.2 and 9.8 mbps respectively (via sd tools and also transfered a movie of 1gb from my ultrabook) For reading speeds all managed more or less the same but Samsung performed a bit faster. priority order - Samsung> Sony> SanDisk so guys if u r planning to buy a sd card within 1k samsung should be your choice also beacuse it comes with a 10 year warranty , also take a look at sd pro which is costly but i think sd plus is best for your needs . Using it in my Xperia. I don't like the plastic samsung phones but it's world's no. 1 company in making silicon chip. what I hate is it doesn't comes with adapter.

Flipkart service, as efficient as always. Product, decent but I'm just a tad disappointed. Reason: I've 7 Sandisk extreme 8gb, 16gb and 32 gb SDHC cards rated at 20mb/s 30mb/s and 45mb/s which I use for my DSLR and general use.All rated as Class 10 devices. All of them give similar test results in crystal disk mark as compared to this particular samsung cards results.(test results for 16gb Samsung plus card given below) Practically, transferring data I get about 15-21 mb/s write speed for all of the Sandisk cards. Even despite their differently claimed speeds,I guess, all of them are identical and the speeds written are a marketing gimmick. Transferring large files is a breeze compared to the other class 2, class 4 and 6 cards I have. On this 16 GB samsung plus micro SDHC UHS-I card, practically i get about 9-10mb/s write speed and at times 10-13mb/s. So i must say its a little slower. The above mentioned speeds and the Crystal diskmark test result is only possible when card is inserted into the laptops memory card slot via micro sd adapter. While using a card reader in usb slot the speed is very much slower of course. Like 3mb/s write speed. The test results for this particular 16 GB samsung card are below: ----------------------------------------------------------------------- CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo ----------------------------------------------------------------------- * MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s] Sequential Read : 19.558 MB/s Sequential Write : 14.790 MB/s Random Read 512KB : 19.376 MB/s Random Write 512KB : 14.887 MB/s Random Read 4KB (QD=1) : 4.371 MB/s [ 1067.2 IOPS] Random Write 4KB (QD=1) : 2.399 MB/s [ 585.8 IOPS] Random Read 4KB (QD=32) : 5.410 MB/s [ 1320.8 IOPS] Random Write 4KB (QD=32) : 2.396 MB/s [ 584.9 IOPS] Test : 50 MB [P: 22.2% (3.3/14.6 GB)] (x5) Date : 2013/10/08 19:00:28 OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x64) However tested with different parameters on DiskMark it reveals its true colors: ----------------------------------------------------------------------- CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo ----------------------------------------------------------------------- * MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s] Sequential Read : 19.362 MB/s Sequential Write : 7.939 MB/s Test : 1000 MB [P: 24.6% (3.6/14.6 GB)] (x1) Date : 2013/10/08 20:25:08 OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x64) The sandisk cards give read and write results close to 20 mb/s. Tested using an app (A1 SD Bench) on the samsung galaxy s duos the results are: Read: 11.57mb/s Write: 9.9mb/s This is closer to the cards real life performance. I had read a review given by another gentleman on flipkart showing similar results for crystal diskmark. Appreciate the trouble he went through to write a detailed review. Hence, I went for it. Over all I had expected to get about 15-20mb/s practical write speeds which would have made me happy. 9-13 mb/s not so happy. Note: The sandisk extreme cards are higher priced than this card and they are not micro sd but SDHC cards. I'd have given 5 stars it the speed had been a little higher as I'd expected. Verdict: A decent enough card at the price. Could have been a little faster.

The Samsung micro sdhc PRO is a great memory card which provides faster speed at decent price then other options available in the market. But if you want to test its real speed then you have to get a usb 3.0 Card reader with your pc( with usb 3.0 port ). Otherwise you only see difference in your smartphone. Shipping was great but delivery was a little bit late... But overall experience of purchase was great.