[Trick] Speed Up Satelite Fix for GPS on Android

chinhodado

Member
Feb 24, 2013
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There is one thing that I'm not sure and I would like to know - the NTP server settings - do I need to have mobile data to use those NTP servers on the run? In other word, if I don't have mobile data, would changing the NTP server settings do anything?
 

An Droid

Senior Member
Aug 27, 2010
323
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NTP servers are "Network Time Protocol" servers. Your device/computer uses them to sync it's internal clock with an accurate Atomic Clock.

GPS relies on accurate time to calculate your position. Without a data connection, GPS should still work but it's accuracy would be affected if the internal clock on your device is no longer precise/accurate. I'd assume inability to connect to the NTP server(s) would result in a fallback to the devices internal clock.

Your device will also get it's time from your cell phone provider (provided you have it configured that way), which is hopefully also accurate as they should be syncing via NTP as well.

Sent from my SHIELD Tablet using XDA Free mobile app
 

U.Pendragon

New member
Nov 27, 2017
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@Primokorn

The servers you recommend don't respond to HTTPS requests.

The following do:
"https://xtrapath1.izatcloud.net/xtra.bin"
"https://xtrapath2.izatcloud.net/xtra.bin"
"https://xtrapath3.izatcloud.net/xtra.bin"
 

Primokorn

Recognized Contributor / Themer
Nov 17, 2012
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@Primokorn

The servers you recommend don't respond to HTTPS requests.

The following do:
"https://xtrapath1.izatcloud.net/xtra.bin"
"https://xtrapath2.izatcloud.net/xtra.bin"
"https://xtrapath3.izatcloud.net/xtra.bin"
It depends on the XTRA files you want to use.

However here is what I'm using now on my OP3T:
XTRA_SERVER_1=https://xtrapath1.izatcloud.net/xtra3grc.bin
XTRA_SERVER_2=https://xtrapath2.izatcloud.net/xtra3grc.bin
XTRA_SERVER_3=https://xtrapath3.izatcloud.net/xtra3grc.bin
What's the advantage to using SSL connections?

Sent from my PH-1 using XDA Labs
Maybe you should click on the above link...
this allows an attacker to mount a MITM attack on the network level and modify the GPS assistance data while in transit. While XTRA2 files do use a CRC checksum, it would be possible to re-calculate it.....
That's why I'm using XTRA3 + SSL now.