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Very interesting! We would need more benchmarks to confirm, but it seems each device gives consistent results:
  • iPhone 6 128GB: fast write, fast read
  • iPhone 6 64GB: slow write, fast read
  • iPhone 6+ 128GB: fast write, slow read
Code:
Device ---	User ---	Write	Read
iPhone 6 128GB	eclipsevv	174	363
iPhone 6 128GB	stempsons	167	359
iPhone 6+ 128GB	TEMPA ---	135	195
iPhone 6 64GB	kemal ---	54	337
iPhone 6 64GB	JoeyD74 ---	64	234
iPad Air2 64GB	nagypeter	161	932

My iPhone 6 plus 128GB first performed following (Write: 158 and Read: 197) after all apps were closed.
But then i rebooted it and then the resaults was way different (Write: 160 and Read: 369)
 
People in China kinda found out how to check for TLC or MLC in your iPhone 6/6+ without jailbreak.
Please use the app at your own risk.

Download the app form this link: http://www.pgyer.com/IOKitBrowser

Run the App

Under Root->N61AP->AppleARMPE->arm-io->AppleT7000IO->
ans->AppleA7IOPV1->AppleCSI->asp->ASPStorage (Look for Device Characteristics)
***************************************************
"default-bits-per-cell"=2 is MLC,"default-bits-per-cell"=3 is TLC
***************************************************
Here is the google translate site for the original instruction. https://translate.google.com/transl...hread&tid=8574481&extra=page=&page=1&mobile=2

Another website test in HK (google translate site). https://translate.google.com/translate?hl=en&sl=zh-CN&tl=en&u=http://www.hkepc.com/11911&sandbox=1
 
On Macs the higher capacity SSD's are faster. On iOS they are slower :(

How will exchanging an iPhone now help matters? I assume it will take a while for Apple to change to TLC Flash.

Yes! Exactly! I went to the Apple Store because I have backlight bleed and they said it was a cosmetic issue which is fair and they said they could replace it ONCE and that the problem could be there and worse possibly so I just decided to keep mine as it is minimal and be happy because NOTHING is perfect in this world. I wanna keep my iPhone for a very long time and not be worried anymore about replacements and problems unless they become very evident. Thank you for that thoughtful and good comment! I think Apple will most likely try to get it fixed with a software release.
 
Very interesting! We would need more benchmarks to confirm, but it seems each device gives consistent results:
  • iPhone 6 128GB: fast write, fast read
  • iPhone 6 64GB: slow write, fast read
  • iPhone 6+ 128GB: fast write, slow read
Code:
Device ---	User ---	Write	Read
iPhone 6 128GB	eclipsevv	174	363
iPhone 6 128GB	stempsons	167	359
iPhone 6+ 128GB	TEMPA ---	135	195
iPhone 6 64GB	kemal ---	54	337
iPhone 6 64GB	JoeyD74 ---	64	234
iPad Air2 64GB	nagypeter	161	932

Hmmm. What does this all mean!
 
We could do it ourselves by comparing our devices.

I'm attaching results from 3 benchmark apps; left to right:
- AnTuTu (storage: 2580)
- PerformanceTest Mobile by Passmark (Write 174, Read 363)
- PhoneDoctor (paid app) (write 280, read 763)

Image Image Image

It's a 128GB iPhone 6, black, space grey, serial C39.

Can you provide your results?

What?!!!!!??!!!?

6Plus 64GB SG
 

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Wait...did you say this? "I know this sounds like total hearsay, but what the heck:

I ordered an iPhone 6 128gb in Israel today. While in line, we talked about the so-called recall and that it's probably nothing. Someone in line was an apple employee working at anobit (I saw the employee card because the person purchased a computer with an employee discount). That person said that it is indeed an issue and a recall is in progress.

If it is indeed the case - you heard it here first! :)"

Oh dear! If this is true then should I get a replacement becuase my iPhone has become lagging, freezes and turns off by itself mybe every week or so...???
 
Does reading and writing numbers mean your iPhone is slower? Because I think mine is still super fast and no reboots.
 
So it's confirmed that the 64gb & 128gb iPhone 6 are using TLC to save cost while 16gb is using the faster and more expensive MLC chips?

No wonder my iPhone 6 with 64gb boot loop twice since release. Anyone with the iPhone 6-16gb experience any boot loop?
 
Wait...did you say this? "I know this sounds like total hearsay, but what the heck:

I ordered an iPhone 6 128gb in Israel today. While in line, we talked about the so-called recall and that it's probably nothing. Someone in line was an apple employee working at anobit (I saw the employee card because the person purchased a computer with an employee discount). That person said that it is indeed an issue and a recall is in progress.

If it is indeed the case - you heard it here first! :)"

Oh dear! If this is true then should I get a replacement becuase my iPhone has become lagging, freezes and turns off by itself mybe every week or so...???

Does odedia work for Samsung by any chance? Is there a source or a link to a credible site for that neat little story, or is this another instance of sprinkling damaging rumours?
 
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So it's confirmed that the 64gb & 128gb iPhone 6 are using TLC to save cost while 16gb is using the faster and more expensive MLC chips?

No wonder my iPhone 6 with 64gb boot loop twice since release. Anyone with the iPhone 6-16gb experience any boot loop?


If 64 and 128 use the same chips they should behave the same way. I have the 128 and no reboots or loops at all since getting the phone 6 weeks ago.
 
If 64 and 128 use the same chips they should behave the same way. I have the 128 and no reboots or loops at all since getting the phone 6 weeks ago.

Actually based on the results posted above, iPhone 6 128gb seems to have fast read & write speeds compared to iPhone 6 64gb and 128gb iPhone 6+ so I guess only the iPhone 6 64gb uses the weaker TLC chip.
 
Apple Said to Be Stopping Use of TLC NAND Flash in iPhone 6 and 6 Plus After ...

Actually based on the results posted above, iPhone 6 128gb seems to have fast read & write speeds compared to iPhone 6 64gb and 128gb iPhone 6+ so I guess only the iPhone 6 64gb uses the weaker TLC chip.


Numbers aside I'm quite satisfied with the phone so at this point it's a non-issue to me. But nice to know its the better performer of the lot.

----------

One thing that was a major improvement over my 5s was its performance as a phone. In one of the places I frequent the 5s and prior iPhones got a very poor to no signal on AT&T. The 6+ consistently gets a useable signal ( at least 2 dots) at the same location where the other phones would often get none at all. That alone made the upgrade worthwhile. Is the antenna in the plus perhaps larger since there's more room for it than in previous iPhones? That would explain it.
 
I have a 6 64 GB with many issues, freezing, rebooting, white screen, poor reception, losing cell connection. I have had it replaced by Apple and it's no help. It's been wiped and started from new many times. I went to my carrier, Verizon, who did everything they could do and went through the system resetting everything on my line.
Is this chip to blame of is it something else?
 
I have a 6 64 GB with many issues, freezing, rebooting, white screen, poor reception, losing cell connection. I have had it replaced by Apple and it's no help. It's been wiped and started from new many times. I went to my carrier, Verizon, who did everything they could do and went through the system resetting everything on my line.
Is this chip to blame of is it something else?

It's best to let Apple engineers diagnose this, it's early and they need time.
 
It's best to let Apple engineers diagnose this, it's early and they need time.

I wish an engineer would look at my phone. The Apple Store isn't much help, one person there says my issues can't be the phone, another says yes the software issues can cause my issues. It's getting old quick. Next week I will have Apple fix it or keep it. I hate to go back to a Android phone but I'm at the point where a flip phone looks good.
 
Actually based on the results posted above, iPhone 6 128gb seems to have fast read & write speeds compared to iPhone 6 64gb and 128gb iPhone 6+ so I guess only the iPhone 6 64gb uses the weaker TLC chip.


How is that even possible. How do we know these tests are accurate. All the phones should be freshly rebooted and no apps running
 
How is that even possible. How do we know these tests are accurate. All the phones should be freshly rebooted and no apps running

Two iPhone 6 64gb users reported write speed below 100 while another iPhone 6 64gb user has write speed of 165 which was purchased this month and all the results posted seem to be consistent in range.

I say Apple might have already started switching to the faster MLC chips for the iPhone 6 64gb.

We need more users to post their results and purchase date for better accurancy. If there is anyone who bought iPhone 6 64gb near release day with high write speeds, please post.
 
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Hello,

Excuse me for my poor english, I'm french ;-)

I have the two last devices : iPad Air 2 64gb and iPhone 6 64gb ( iPhone just purchased yesterday)

The results with PerformanceTest Mobile :

iPhone 6 64gb : Storage write 165 MByte/sec; Storage read 336 Mbyte/sec

iPad Air 2 : Storage write 172 MByte/sec; Storage read 975 Mbyte/sec

Iphone free memory : 47,4Go
Ipad free memory : 46 Go

I retry the test this day with my iPhone 6 64 Gb and my old iPhone 5s 16 Gb. ( iPhone 6 week factory 43)

Method : reboot and no app open.

Results :

- iPhone 6 64 Gb : Storage write : 165 MByte/sec; Storage read : 350 MByte/sec

- iPhone 5s 16 Gb : Storage write : 38,7 MByte/sec; Storage read : 270 MByte/sec

Storage free with theses iPhones :

6 : 47,2 Gb
5s: 3,7 Gb

If this results can help you :)
 
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Two iPhone 6 64gb users reported write speed below 100 while another iPhone 6 64gb user has write speed of 165 which was purchased this month and all the results posted seem to be consistent in range.

I say Apple might have already started switching to the faster MLC chips for the iPhone 6 64gb.

We need more users to post their results and purchase date for better accurancy. If there is anyone who bought iPhone 6 64gb near release day with high write speeds, please post.


But what does that mean writing and reading. I haven't tested my phone yet but mine has had no reboots since I bought. I have 64gb iPhone 6.
 
But what does that mean writing and reading.

Reading speed would be important when loading an app or its data.

Writing is done less often, and usually with fewer bytes, so it's not as important a factor in a mobile device, I would say. (Exception: restoring from a backup or transferring lots of large files.)

(Unlike a desktop, smartphone constant read/writes like the browser cache are done to RAM, not to longterm storage. This is why cheaper NAND with a much smaller write/erase lifetime is okay to use. However, this reminds me that MLC can retain data for anywhere from a year to ten years. Probably should pull off any important photos from those seven year old phones that we stuck in a drawer long ago.)

I haven't tested my phone yet but mine has had no reboots since I bought. I have 64gb iPhone 6.

The thread has evolved. Since no one is sure what causes the reboots, for now the question is just, "Does Apple use TLC NAND, and if so, in which devices?"

From leaked documents, and read/write tests, it seems likely that they do... or did... use TLC. So it could depend on date as well as model.

It's also possible that one factory used/s TLC and one used/s MLC. Yo! Apple experts! Is there a way to determine the build factory from the date and/or serial number?
 
I'm assuming that Apple has error correction within the algorithms for the controller, which would require mapping quite a lot of memory locations. It's conceivable that the algorithm was not tested for such a high number of apps, and as the granularity of the voltage required to read/write the data in TLC is finer than for MLC, there would be the expectation that the error rate would be higher. More data, higher error rate might be causing the problem and updated firmware might very well be a solution with some minor performance penalties
(slower read/write).

The corollary of this is that media data, which is what the bulk of the storage was expected to be filled with, would be fine with a higher error rate. I would imagine that TLC would need improved load leveling and expect that would have already have been optimized.

Bottom line; if in fact some update fixes the bulk of users with issues, it isn't likely that there will be any uptick in problems over normal usage that would affect more than a very small number of users, who could be accommodated with replacement iPhones.

Pure speculation caveat included at no extra charge, for a limited time, where permitted.

Your points are logical and well taken. Thanks #
 
I wish an engineer would look at my phone. The Apple Store isn't much help, one person there says my issues can't be the phone, another says yes the software issues can cause my issues. It's getting old quick. Next week I will have Apple fix it or keep it. I hate to go back to a Android phone but I'm at the point where a flip phone looks good.

I do understand your frustration. Due to the true technical nature of the issue anyone lacking an education in tech is guessing.

I use and greatly enjoy both iOS and Android. There's never been a better time to try an Android phone.

Frankly I prefer Android when it comes to its robust feature set, and ability to do things that cannot be done with iOS.

Apple has allowed it's quality and reliability to slip away in recent times. It's very disappointing. I think the massive sales and revenue has gone to their heads.
 
I do understand your frustration. Due to the true technical nature of the issue anyone lacking an education in tech is guessing.

I use and greatly enjoy both iOS and Android. There's never been a better time to try an Android phone.

Frankly I prefer Android when it comes to its robust feature set, and ability to do things that cannot be done with iOS.

Apple has allowed it's quality and reliability to slip away in recent times. It's very disappointing. I think the massive sales and revenue has gone to their heads.

I went to Iphone from Android because of issues like this. The iPhone has always been easy to use and honestly I don't use any phone to its potential.
Outside of my issues I like the phone, it's sized right and the battery is great. I'm not a gamer or a streamer, I use my phone for calls, emails, note taking, and web searching.
 
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