Apple iPhone 5s has issues with motion sensors calibration that affect gaming


Apple's brand new and uncompromising 64-bit A7 chipset has a dedicated chip for motion sensing. Separate silicon for always-on tasks is the trend these days, in order to keep the power draw to a minimum, and Motorola did the same thing with its speech-processing chip in the X8 CPU.

The thing is that the new iPhone 5s touts its motion sensing tech as a big deal, planning to use it for elaborate fitness apps and the like, analyzing your every move. The new bubble level, for example, has all the new feature roundups include it as something novel that takes advantage of the enhanced motion sensing ability.

It turns out that the level, compass and other apps that use the iPhone 5s built-in gyroscope, accelerometer and magnetometer, are a bit off, to the tune of 2-6 degrees for the level meter, for instance. This might not seem like much, but in fact could affect your gaming or home improvement undertakings.

Different users are reporting different readings for their iPhone 5s, suggesting that the problem is not with iOS 7, but rather due to ragtag factory calibration, and might not be simple to fix. The M7 silicon soaks the readings from two sensors Apple is traditionally using - STMicro gyroscope and Asahi Kasei compass - but the accelerometer is a brand new for Cupertino 3-axis Bosch Sensortech unit. 

This means new calibration method had to be done from scratch for the iPhone 5s, and something might have been messed up, or the readings get scrambled along the way to the M7, and maybe even in the new chip itself. Either way, the first iPhone 5s batches could be a few degrees off in their motion sensor readings compared to professional equipment, so bear this in mind.

source: Gizmodo & MacRumors

Related phones

iPhone 5s
  • Display 4.0" 640 x 1136 pixels
  • Camera 8 MP / 1.2 MP front
  • Processor Apple A7, Dual-core, 1300 MHz
  • Storage 64 GB
  • Battery 1570 mAh(10h 3G talk time)

FEATURED VIDEO

46 Comments

1. JMartin22

Posts: 2372; Member since: Apr 30, 2013

BUT.. BUT... Apple always does it right. :(

7. james004

Posts: 486; Member since: May 15, 2013

that 64 bit processor is out of this world. literally! screw gravity. iphone is smarter than that.

9. twens

Posts: 1180; Member since: Feb 25, 2012

You mean the 64 bit that my exynos in my note 3 completely destroys right?

10. THE.DARK.KNIGHT

Posts: 269; Member since: Sep 09, 2013

Are you sure? The 64 bit A7 CPU is of intel bay trail standards. It has even beaten LG G2

14. vincelongman

Posts: 5720; Member since: Feb 10, 2013

From what I've seen the A7 is about equal to the S800 in term of performance, higher in some and lower in some. The only benchmarks which the A7 won by big margins were on-screen graphics (because the iPhone's resolution is far lower) and browser benchmarks (because Safari is the most optimized browser)

26. alexfiran

Posts: 40; Member since: Jun 13, 2013

well it may be fast but the note 3 has 3 gb of ram and this makes the 800 soc really valuable. The iphone 5s however has only 1 gb of ram which makes the 64 bit chip almost useless

35. Shatter

Posts: 2036; Member since: May 29, 2013

I'm sorry but it is pretty obvious the 5s CPU benchmarks are being faked by Apple to try to pass off an a7 as being good. I really want a company to copy the A7 like mediatek and use 2 armv8 cores @ 1.3ghz and it will be a pile of crap. There is no way the changes from the A6 to the A7 nearly doubled its performance, it is pretty obvious the 5s is not as powerful as Apple is making it out to be. I know 1 person who bought a 5s and all they do is complain about how laggy IOS 7 is. Its pretty pathetic apple adds a select handful of android features and their phones all lag. Do the research there is nothing that changed that explains the performance gain. The only logical explanation is apple is faking cpu benchmark scores to make it look as good/slightly better than the S800. This is all armv8 did:http://www.arm.com/files/downloads/ARMv8_Architecture.pdf

21. deewinc

Posts: 455; Member since: Feb 21, 2013

You joking right ? ROTFL

29. promise7

Posts: 894; Member since: Jul 03, 2013

You mean the Note 3 that cheats?

36. THE.DARK.KNIGHT

Posts: 269; Member since: Sep 09, 2013

+1 million @promise7

46. james004

Posts: 486; Member since: May 15, 2013

calm down samsung fan, i was making fun of apple 64 bit processor that was so hyped up about and is crapping out now.

34. nxl2610

Posts: 49; Member since: Aug 14, 2013

Rly ? I though you are smarter than that

37. Shatter

Posts: 2036; Member since: May 29, 2013

The difference between the A6 and A7 would be like the core 2 duo vs an original i3, then the Core 2 Quad would be android. The core 2 quad is much better if you were unaware.

31. mafiaprinc3

Posts: 585; Member since: May 07, 2012

apple "we do but you're using it wrong!". stuff happens man

3. aditya.k

Posts: 496; Member since: Mar 10, 2013

lol you're holding it wrong. How can apple be wrong? xD

6. iluvsonynokia

Posts: 161; Member since: Aug 27, 2013

IPhone fanboys can cope with that,why we bother

4. JMartin22

Posts: 2372; Member since: Apr 30, 2013

The iPhone just doesn't like you, you're the problem. ):

5. Berzerk000

Posts: 4275; Member since: Jun 26, 2011

I really hope Apple addresses this problem correctly. Just say sorry for the inconvenience and improve the calibration of future iPhone 5S shipments, and send an update to current ones to fix the problem, if possible.

16. vincelongman

Posts: 5720; Member since: Feb 10, 2013

I wonder if its a hardware or software issue. If software, then Apple will easily fix it with a quick update. However, if its hardware, then it would take longer and maybe inconvenient to users.

8. twens

Posts: 1180; Member since: Feb 25, 2012

The iphone always works right? yea right. last i checked IOS 7 is the buggiest phone OS ever. Just as android is becoming smoother and stable with each release IOS is taking the laggy aspect of android just by adding few features.lol Picture IOS with all the features of Anndroid 4.3 out of the box. It will crush like hell.lol

12. THE.DARK.KNIGHT

Posts: 269; Member since: Sep 09, 2013

Wait for iOS 7.1 and I face more bugs on a daily basis with my GS3 than my iPhone 5S. I use my ipad for at least 6 hours day including gaming, work, web browsing and I experience may be one bug every 7 days. These are minor bugs and will be fixed very quickly.

13. Sniggly

Posts: 7305; Member since: Dec 05, 2009

Hey, Knight, you read the article, right? It spells out that this might not be a minor software bug, but a hardware issue.

17. JMartin22

Posts: 2372; Member since: Apr 30, 2013

You try so hard to troll its not funny.

22. Sniggly

Posts: 7305; Member since: Dec 05, 2009

That, and the grammatical issues, remind me so much of Taco. But he is new. Maybe we should give him the benefit of the doubt.

38. HouTexan

Posts: 461; Member since: Jan 08, 2012

Wait, minor issues? When android "minor issues", you Apple-heads blow it out of proportion and call it buggy. iOS7 is buggy as all get out; no denying that.

15. LiquidGalaxy

Posts: 332; Member since: Jul 03, 2013

Are these Android idiots actually serious? Lol

23. Sniggly

Posts: 7305; Member since: Dec 05, 2009

What seriousness are you questioning?

30. promise7

Posts: 894; Member since: Jul 03, 2013

"Buggiest OS ever?" Please provide proof that shows it had more bugs than all other OSes that have ever been released.

39. HouTexan

Posts: 461; Member since: Jan 08, 2012

I can't justify that answer, but I can say that iOS7 is buggy as hell; something, apparently, only Android is supposed to experience, according to Apple fans.

44. DukeX

Posts: 327; Member since: Aug 28, 2013

Apple fans superiority complex at play here. Thinking apple products have no problems but they have people always complaining on macrumors and any other apple forum. Ifans are the most hypocritical fanboys of all time and i don't care what anybody says. They deserve these bugs cause of all the bad karma and even death threats to other users who don't use apple products. One guy on here had the nerve to call me out because i said a lot of so called problems on android come from user error. Which is very VERY true. He never replied back like a typical ifan who claims to never be wrong. Im telling you. It's that superiority complex in motion!

* Some comments have been hidden, because they don't meet the discussions rules.

Latest Stories

This copy is for your personal, non-commercial use only. You can order presentation-ready copies for distribution to your colleagues, clients or customers at https://www.parsintl.com/phonearena or use the Reprints & Permissions tool that appears at the bottom of each web page. Visit https://www.parsintl.com/ for samples and additional information.