topic Re: gps precision in XPERIA archive

gps precision

japtan — Wed, 24 Jun 2015 20:16:27 GMT

Hello,
I own a Sony xperia c4 dual. My gps is really accurate in Waze (error is less than 5 meters). But even when 8 to 12 satellites are locked, I see in Gps Status a precision between 25 to 75 meters. I guess this is the reason why other apps report there is no Gps fix (eg. ICoyote).

Is it a known issue ?is it hardware or software ?should I send back my device in rma?

Thanks.

Re: gps precision

Uliwooly — Wed, 24 Jun 2015 20:24:03 GMT

@japtan

Settings > location > how accurate is your GPS?

Re: gps precision

japtan — Wed, 24 Jun 2015 20:25:21 GMT

High accuracy

Re: gps precision

Phy — Wed, 24 Jun 2015 22:02:32 GMT

How accurate is the GPS while on safe mode?

How to boot on safe mode

http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

Re: gps precision

japtan — Thu, 25 Jun 2015 08:19:52 GMT

Thanks for your answer.

I tried safe mode, but as Waze and GPS Status are not available in this mode, I am not really able to give any additional feedback. Though, I tried Google Maps in safe mode, which got a good fix quite quickly. I made the same manipulation right after in "normal" mode, and the Google Maps fix was quite as fast. But still, in GPS Status, precision was between 25 & 75 meters.

To give you some additional info:

I use the same car holder in the same location as for my Galaxy S3 which gives a quick, good and stable fix
at the time of my tests, the sky was completely blue, I tested on 300km of highway (almost no tree and this kind of obstacle)
I also tried on 50km on my motorbike (so not even a windshield to block the signal) =>same outcome

Re: gps precision

Uliwooly — Thu, 25 Jun 2015 18:55:15 GMT

@japtan

I think it's a third party app creating this issue.

Try this

settings > Backup & reset > automatic restore > off > then repair your phone with PCC > do NOT install any app, uninstall any antivirus > install waze > check again

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

Re: gps precision

Guich — Fri, 26 Jun 2015 06:56:13 GMT

Hello Japtan,

I think it's a software problem.

I have exactly the same problem on my Xperia C4 Dual : I got a fix in Google Maps or in Waze but I can't get a fix in Icoyote.

I hope a solution, too....

Re: gps precision

Uliwooly — Fri, 26 Jun 2015 17:04:08 GMT

@Guich

Contact the app developer.

Re: gps precision

japtan — Sat, 27 Jun 2015 20:19:02 GMT

The issue is actually that the GPS reports an accuracy over 50 meters as soon as you drive quicker than 110-115km/h, even if actually, the accuracy is really good,around 5-10 meters. I can understand that an app condiders there is no more GPS signal when the phone says itself that the accuracy is over 50 meters...

So, basically, it will probably be my last message on this topic as I will send the phone back.

Re: gps precision

Uliwooly — Sat, 27 Jun 2015 21:52:20 GMT

@japtan

No problem, but if other apps work just fine, that's an app issue, enjoy your next phone.

Re: gps precision

Cdem55 — Mon, 29 Jun 2015 08:19:57 GMT

No, it is not an application issue, but a GPS issue : the GPS report bad info about its position accuracy.
Some apps use this information, others don't. For those who use it, the GPS is detected as faulty passed 100km\h. For those who doesn't use this information, the gps is OK.
Si, Sony should correct its GPS

Re: gps precision

Guich — Mon, 29 Jun 2015 15:06:38 GMT

Same issue and same conclusion : this is NOT an app issue, Sony should fix it, gps reports bad precision in highway...

Re: gps precision

Uliwooly — Sat, 04 Jul 2015 00:03:26 GMT

@Cdem55

It works with Google maps but not with other apps?