Develop Bugs

[Q] GPS doesn't work without downloading GPS data from the internet.

Hello,
I have Galaxy nexus factory rom 4.2.2 (unlocked and rooted) and I am very angry with GPS offline locking. I was used from other devices like HTC that all I need is just to turn on GPS and it will get the signal right away without a need to download any data for better locking. And I don't understand what it can't be that simple on Galaxy nexus GSM.
If I start for example "GPS status" app and this app is not able to download GPS location it WON'T lock ( it gets for example 3-4 satellites for a while and then all satellites disappears and it starts locking for satellites again.. - finds few satellites and drop them afterward but never lock if no data connection....) etc. ! I also tried to reset GPS data. But if I let it use data connection (wifi) it works right away like charm!
I don't really understand how it works. I guess it needs to download some kind of first lock data location according to my carrier or location internet provider. I am using NAVIGATOR for GPS navigation.
question 1:
is there any way how to make the phone work just by turning GPS on without using any data connection ?
question2:
If not, is there any way how I can pre-download the GPS location so I don't need to download it from the internet but just load it from the saved file or something?
I was searching but didn't find this kind of problem.
Thanks for any help.

I'll piggy-back on that thread since I'm having the same problem.
I moved my Galaxy Nexus (GSM, Maguro) from the stock Android to Cyanogenmod over a year ago, and noticed that GPS just won't work when I'm in a foreign country, ie. without a data connection while it works fine in my home country with a data connection.
Even after riding around outside for a whole day in open fields, GPS still won't locate me without a data connection.
I also noticed that while travelling abroad, GPS will locate me within a few seconds after I connect to the Net through a wifi connection.
Before I get a GPS + Glonass smartphone, I was wondering if someone knows if the problem is software-related and has a fix.
Here's what I'm currently running:
Android 4.4.4
CyanogenMod 11.0-Installer-XNPQ32P
Baseband version I9250XXLJ1
Thank you.

Pac ROM GPS + Wifi Issues

Hey XDA,
i am using almost the latest nightlies (17Aug-4.4.4) of Pac Rom on my f180-converted to e975 . i have 2 issues with it
1) GPS refuses to work. It wont get a lock or even satellites in range. At the same location my iphone gets a proper lock within a min.
2) Wifi Scanning doesnt work. I have to manually add Wi-Fi networks.
Anyone knows any fixes or threads with the fixes?
Thanks
Sent from my LG-E975

Anyone?

OnePlus 3 GPS signal lost!

Good day all,
In my city, most often I found GPS signal lost when using Google maps while driving. It happens even in clear sky.
I face this problem also with my OnePlus 1. The problem happens in any ROM and stock too.
I found temporarily solution to return or to strength to the GPS signal is to switch my mobile to "Airplane Mode". If this mode enabled, the GPS signal will be fix in a second!
Anyone faced this problem?
Sent from my ONEPLUS A3003 using Tapatalk

Wifi issue

Hello community,
1. I have a low wifi signal - about 10-12 dbm less then my old lg g3 or lg g5 or galaxy j7 pro - seams it is just an integrated wifi antenna issue and there is no way to fix it
2. When scanning wifi networks I have a very not stable results: even when the signal is excellent about 55-60dbm the ssid is appear and goes all the time occasionally - seams it is a wifi driver bug
Especially I see it when using WIFI analyzer.
Couple of days before I opened thread with Sony support and don't have answer.
I must have the WI-FI card working well !
Someone have the same issues?
Someone have any ideas about fixing the low wifi signal ?
Thanks,
p.s the wifi connection is stable with day by day standard usage.
Aviv

hi
I CANT EVEN USE WIFI
like u said,i found my signals are very weak at the first.
i think its just a bug and didnt care about it
however 1 week later my phone suddenly cannot connect to any wifi.all the wifi spots are shown as almost no signal and it will repeat"connecting,saved"'
and i found this is a serious problem,used Xperia companion to fix that
But it didnt work and i couldnt turn on the wifi option now.
it will reboot when im trying to turn on the wifi option.
i think its likely to be a hardware issue,but my LTE worked very well without problem.
im very Confusing now

GPS Issues while non LTE band

Hello I have several issues with GPS when my A2 Lite is on 3G or 2G signals, so the GPS keeps dropping every few seconds but when the 4G signal kicks in, then I have continuous GPS signal with no interruptions until 3G or 2G kicks in again... If I set the phone on Airplane mode, the GPS also works just fine. The curious thing is that I previously had a REDMI 4 (Prada) with Android 6 which had the exact same issue and I thought it was a hardware issue but now with the A2 Lite the issue is the same... I replaced the SIM card just in case with no success at all. I find quite interesting that I have not found this issue in forums all over the internet and I can´t find people talking about GPS on the A2 lite at all, is like nobody uses google maps or Waze on their phones......
So my question is: Is this GPS issue a hardware problem or an OS issue.

Hi, sorry mate for not posting any solution, but assuring you''re not alone in this.
I have similar issue on my A2 lite. When I'm on Gps navigating to somewhere and a call comes in. That disconnects my GPS immediately. My phone signal would jump from 4G to 3G. My waze would state, "searching for Network". Which leaves waze stuck without moving.
I'm no technie, but I believe this phone has issues with the band support. When a call comes in, it jumps from 4G to 3G and we Can't surf internet. Not slow, but the internet just doesn't load at all. This jump somehow disconnects GPS. Intermittently the GPS would start working while on the call, but it's hard to say.

Gps and network are 2 separate things, what you guys describe is not gps dropping but the inability of the device to download maps data. That's the problem with maps apps which don't rely on local maps (downloaded in advance) but on updating the map as you go. The gps itself works really well on this device, it finds a fix in a few seconds within 3 meters. There's Here We Go map which can also use local maps and if you don't need up-to-date traffic info you don't really need internet. There's also an open-source map called PocketMaps which does the same thing and it's a solid app. If you need to test gps there's an app called SatStat which shows the exact number of satellites in use.

celrau said:
Gps and network are 2 separate things, what you guys describe is not gps dropping but the inability of the device to download maps data. That's the problem with maps apps which don't rely on local maps (downloaded in advance) but on updating the map as you go. The gps itself works really well on this device, it finds a fix in a few seconds within 3 meters. There's Here We Go map which can also use local maps and if you don't need up-to-date traffic info you don't really need internet. There's also an open-source map called PocketMaps which does the same thing and it's a solid app. If you need to test gps there's an app called SatStat which shows the exact number of satellites in use.
Click to expand...
Click to collapse
Hi,
Me and my wife have the same problem. Me with a Mi Mix 3 and she with a Mi 8 Lite. It's not an online map problem because the map is downloaded and displayed.
Moreover, this problem does not exist on our previous phone (OnePlus 5 and OnePlus 6).

Blm79 said:
Hi,
Me and my wife have the same problem. Me with a Mi Mix 3 and she with a Mi 8 Lite. It's not an online map problem because the map is downloaded and displayed.
Moreover, this problem does not exist on our previous phone (OnePlus 5 and OnePlus 6).
Click to expand...
Click to collapse
I'm not an expert on this but the app SatStat is really helpful in troubleshooting location issues. In the main interface you can see how fast your phone finds satellites, how fast it can use them and how many. There is also a map interface which shows location based on network (cell towers and WiFi access points) which is generally less precise but faster. I'd suggest also testing the issue with Here maps in offline setting where it only relies on gps and local map.