Develop Bugs

Very Slow (10 min +) GPS Fix after Froyo update

Hi All,
Any one experiencing slow GPS Fix on V2.2 please ?
I Leave GPS always ON on the power widget, but when i run any software that needs GPS (SportyPal, Sygic, GPS Status, Etc.) it takes some 10 Minutes to get a fix (outside)
On same postion using Samsung Omnia HD (symbian) I get a fix in 23 seconds (cold start) and 6 seconds
Thanks

I believe since froyo there is a new apn type for agps, and you may need to add it manually.
go to settings - wireless & networks - mobile networks - access points. Select the access point with the green dot, scroll down to "APN type" which should be "default" and replace that with "default,supl" (no quotes)
hit back and your gps should be working as before.

Hi,
Thanks for replying, The access point with the green dot is my 3g Internet connection from my mobile service provider.
The APN Type was already " default,supl "
Does GPS Needs to connect to the internet to get a fix ? . . (I keep Mobile Networks OFF)

SpideRMaN-17 said:
Hi,
Thanks for replying, The access point with the green dot is my 3g Internet connection from my mobile service provider.
The APN Type was already " default,supl "
Does GPS Needs to connect to the internet to get a fix ? . . (I keep Mobile Networks OFF)
Click to expand...
Click to collapse
The GPS needs no connection to the internet to get a fix. AGPS is getting your rough position from the Internet and helps GPS to get a faster fix. If your network is off, then it cannot use it of course.
I never tested the GPS under 2.1 but with 2.2 its still faster than on my HTC Diamond 2 with AGPS and WinMo.

spamlucal said:
I believe since froyo there is a new apn type for agps, and you may need to add it manually.
go to settings - wireless & networks - mobile networks - access points. Select the access point with the green dot, scroll down to "APN type" which should be "default" and replace that with "default,supl" (no quotes)
hit back and your gps should be working as before.
Click to expand...
Click to collapse
Spamlucal,thanks for the tip,it worked like a charm.I've been going crazy about the GPS not locking.
Sent from my Archos5 using XDA App

I'm using Froyo 2.2 as well. I have mobile networks off most of the time - testing the GPS - it takes a few seconds to get a lock with mobile networks off - makes no real difference if it is on/off.

If AGPS works the same way on Android as on Winmo then turning off mobile network and then testing time to fix isn't really testing the effectiveness or otherwise of AGPS as the data is only updated once every 3-4 days and cached
I always have mobile networks on, but only switch GPS on when I need to use it, fix never take more than 30 secs or so, same on 2.2 and 2.1 for me...
P

I'm not sure about data and A-GPS. As I understand it, there are 3 factors in play here: normal GPS location, approximate location based on your IP/gsm cell etc, and assisted GPS information where the GPS Ephemeris data is downloaded over the network, which primes your GPS receiver with the approximate coordinates of the satellites for the next 3-5 days. The latter results in a faster fix.

I can now confirm that if I enable Mobile Networks and then access any GPS software the fix is almost instantly (5 Sec. or less) I can switch off the mobile networks after the fix and all works fine as before
Thanks to All

SpideRMaN-17 said:
I can now confirm that if I enable Mobile Networks and then access any GPS software the fix is almost instantly (5 Sec. or less) I can switch off the mobile networks after the fix and all works fine as before
Thanks to All
Click to expand...
Click to collapse
That's A-GPS for you! It'll download the latest ephemeris file, which is good for about a week. Without this, it needs to download the info over the gps satellite receiver - which can take 10-15 mins with a clear view of the sky.

landwomble said:
That's A-GPS for you! It'll download the latest ephemeris file, which is good for about a week. Without this, it needs to download the info over the gps satellite receiver - which can take 10-15 mins with a clear view of the sky.
Click to expand...
Click to collapse
yes it's true, but it is lasting only for the session. to get a quick fix i have to do it every time . . is this normal ?

The ultimate fix for WIFI drop-offs

OK, there have been plenty said about various devices having issues of random WIFI drops during good signal conditions.
I have learned long ago that there are some devices that do not play well with legacy Draft N routers and modems connecting to newer WIFI devices that have power save functions.
This issue is primarily with the advanced features within the Modem/Router WIFI features.
Here are the two features that can help with connection drop-offs.
DTIM Interval
Beacon Interval
If you set DTIM Interval to low, you risk flow condition drop-offs. Some people find a value set around 6 to be effective for both gaming and file transfer.
The lower the value the less power is consumed in the WIFI connection. Small devices with smaller batteries need a low value, like 1 to 2. If you have a good sized battery 6 to 8 will work well.
Beacon Interval will create a high level of repeated instances of beacon synchronization, if using WPA security. Which can augment the delay between data stream. If you find yourself in an area of about -80db and drops are noticeable, decreasing the time in between beacon intervals will not allow time to recover. Once authentication breaks, you will need to reset your devices WIFI enable to regain authentication. Changing the interval to 200 to 300 ms will help. But when your interval is set at 1000ms intervals, it will make your issues more problematic.
I keep my numbers one the edge much as possible, so peeps outside my house find connecting extremely difficult at -90db
Many have circumvented the above issues by using WEP or open authentication. Which is only a band aid fix.
Channel congestion can make drop-offs. As it slows your data path and can make extra authentication cycles during recovery.
Before making any changes copy down the original settings for restoring them if needed.
Some apps I am using for my WIFI connection.
WIFI Ace (WIFI Advanced Configuration Editor): Will attach to advanced WIFI hotspots, including none broadcasting SID.
WIFI Fixer: Automatically reconnects during any drop-offs, and will restore connections after sleep cycles.

Battery saving location mode cannot detect a location

As I understand it, after switching to "Battery saving" location mode, my phone should still be able to detect a location based on nearby wifi routers, bluetooth, etc.
If I close all apps, then switch to Battery Saving location, then open google maps, I do not get a location even if I am at home in my flat and have a strong connection to my router. This also happens at work, when connected to wifi routers on the tube (live in London), and so forth.
So I can only conclude that for some reason my phone cannot use this method to determine a location. My GPS does work as well as can be expected, therefore I am not certain when this issue started happening, as, in most buildings, I can get intermittent GPS signal, and have pretty much always just left my phone on "High Accuracy".
However, in some buildings of course, I just cannot get a GPS signal at all, so this issue is getting really frustrating. Before I try some sort of factory reset, is this a known issue at all? Or can anyone suggest anything less drastic to try? Or a potential workaround?
Specs:
- OnePlus 3 (A3003)
- Android 8.0.0
- OxygenOS 5.0.1
Thanks in advance!

Try this, go into settings, tap on WiFi, tap on Wi-Fi preferences, there enable Scanning always available, let us know if that helped!

Problems with GPS signal loss

Good afternoon.
Guys, I've been very angry with Google Maps.
When using turn-by-turn navigation, inside the urban perimeter works fine, but when I move to the rural area I have constant problems of "GPS signal loss".
I noticed that by losing the data signal (4G / 3G), Maps stops navigating. Do you have any way around it? Having a GPS dependent data signal is very infeasible.
Thank you.

Have you tried putting the location mode to "High Precision" or "Device only" in the location settings pane? Sounds like you're not using GPS, but cellular location....

I have already tried both modes and in both the problem is the same.
This problem comes from the time I had a Nexus 5, at the time thought was problem in his hardware, but start to be a bug of the Android itself.

Did you install the app GPS status? If not, please do. It will show an overview of your GPS receiving, and download the latest A-GPS library's.
However put the setting of location on Device only. That's important, it will use the internal receiver instead of network masts.

G 7 play wouldn't re-connect to mobile network

Lost connection with O2 while 3 miles offshore - in full view of Bournemouth, Poole & Swanage. Came ashore, still no connection. Drove 4 miles home, still no connection. Only re-connected after power off and re-start. Had similar connection drop once before.
Is this lack of re-connection usual, or is there a fault?

corystes said:
Lost connection with O2 while 3 miles offshore - in full view of Bournemouth, Poole & Swanage. Came ashore, still no connection. Drove 4 miles home, still no connection. Only re-connected after power off and re-start. Had similar connection drop once before.
Is this lack of re-connection usual, or is there a fault?
Click to expand...
Click to collapse
Sorry for the belated reply. If you haven't yet resolved this issue, there are some remedies you can try. Sometimes, while traveling abroad, or otherwise outside of the normal coverage of your mobile provider, it may be necessary to change your band parameters within your cell radio menu. (To do this, open your dialer and enter *#"#4636#*#* and select PHONE INFORMATION from the list of options. This menu provides pertinent and technical info regarding your cellular radio (baseband), and gives you the option to change your preferred network type and band configs) But to start, I'm not very familiar with the O2 network; from my rudimentary research, it appears that its 2G, 3G and 4G coverage is vast and quite impressive overall as a global provider, claiming a 99% global 4G coverage area. So, I am in full agreement with your position -- that the disconnect you are experiencing is abnormal. Try these possible remedies:
• First and foremost, let's make sure your network configuration is optimal for O2's voice and data parameters. There are a couple of ways to do this, with the simplest being from device settings. Go to Settings>System>Advanced and select the option for Reset WiFi, mobile & Bluetooth. (Ensure that you are within a strong 4G coverage area when performing this step). Next, go to Settings>Network & Internet>Mobile Network>Advanced>Preferred Network Type. You will see a few options here, the first of which should be AUTOMATIC. Ensure that this option is set. Next you will see a menu for Access Point Names; select this option and ensure that (1) your APN is set to an O2 configuration and, if so, (2) that the parameters are correct and optimal for 02's recommended settings for your particular type of mobile plan and your region. O2's recommended APN settings, as well as a comprehensive how-to guide, can be found on 02's official website at this link:
https://community.o2.co.uk/t5/Android/Connecting-Android-Phone-to-Data-Services/td-p/544202 It appears that 02 can send the recommended APN settings directly to your device via texting the word ACTIVE to 2020. Once received, a normal reboot will be required.
Hopefully, these remedies will resolve your carrier disconnect issue. It is also very important that you are updated to the latest available Android OS version/build, because updates and optimizations to your radio firmware (baseband) are often encompassed within OTA update packages. If, after performing these steps, you are still experiencing the disconnect issue, please let me know. There are some more in-depth steps we can take to resolve the issue (e.g. the Cellular Radio Menu I mentioned in the beginning of this post.) There are also some fastboot commands which can be executed to more efficiently optimize your network settings to the parameters of your provider. Good luck and let me know if this works.