Using bell GPS in the US

[aspalaasn]

Originally Posted by tichi

yes, that's what I observe - NO data needed for fast AGPS in NEW BELL ROM..

hm... curious thing... so ... this choice
(whether to use data or voice for AGPS)
is not strictly determined by the carrier, but
instead it merely depends on some reg settings in WM6.1 ..

Interesting, WHICH ones?

this could be very useful to know for cross-border occasions...

I don't think it's agps that you have working. In my edit, I did have gps working but it took longer than when data is on. I didn't get as many sat locks nor can I see as many sats. The signal is weaker as well.

agps may still need data...if it's not agps then, there has to be some explanation as to why it takes longer to lock, fewer sats and weaker as well.

[aspalaasn]

Originally Posted by tichi

so, which rom are u using ?

I'm using a cooked rom from the kitchen 20270.

[tichi]

Originally Posted by aspalaasn

I don't think it's agps that you have working. In my edit, I did have gps working but it took longer than when data is on. I didn't get as many sat locks nor can I see as many sats. The signal is weaker as well.

agps may still need data...if it's not agps then, there has to be some explanation as to why it takes longer to lock, fewer sats and weaker as well.

I recall I discussed this already in some other thread, and
someone told me that
both voice and data channels can be used for AGPS, this is a matter of taste
or choice of the provider...

[tichi]

Originally Posted by aspalaasn

I'm using a cooked rom from the kitchen 20270.

OK, so theres a difference with official new bEll ROM, where one does not need data.. at least when I tried, no arrows in the startmenu bar appear, and
no connection established can be seen in netstats of dotfred task manager...

[aspalaasn]

Originally Posted by tichi

OK, so theres a difference with official new bEll ROM, where one does not need data.. at least when I tried, no arrows in the startmenu bar appear, and
no connection established can be seen in netstats of dotfred task manager...

I'm not sure what the difference is...I didn't really try the new bell rom that much since iGO wouldn't start for me, so I just reflashed a kitchen rom right after. I still got good gps signal when I didnt have data blocked/off but when I did block/turned off data, it wasn't as good.

Whether it's because of AGPS or something else I don't know. All I know is that data does seem to help with having more sats and more locks and stronger signals.

Are you using the Bell rom right now? Have you tried turning off data, as well as blocking data with "no data" or something similar? See if you get just as fast a lock with as many locks and see as many sats as when data is on. Do this from a cold start since once you get a lock it seems to already know which sats are around the area. This caused me to think all was ok, but after I started experimenting, I've noticed a difference when data is on/off.

I'm not sure if it's something in the registry or not...AGPS or something else.

[tichi]

Originally Posted by aspalaasn

Are you using the Bell rom right now? Have you tried turning off data, as well as blocking data with "no data" or something similar? See if you get just as fast a lock with as many locks and see as many sats as when data is on. Do this from a cold start since once you get a lock it seems to already know which sats are around the area. This caused me to think all was ok, but after I started experimenting, I've noticed a difference when data is on/off.

yes, I use the new Bell ROM (the one that is approx one-month old),
and I did arrive to exactly the opposite conclusion - I did NOT notice
any difference with data on/off.. I turned the data off, and I waited for about an hour, which is enough for ephemeris data to expire, so that GPS starts "from cold"... Then I started GPSviewer, and was looking at the (absense of) arrows in the connection icon, as well as at the net stats in dotfred taskman... nothing even changed, and the GPS lock was as fast as usual - under half a minute
from cold..

from this I conclude that AGPS does not need data...

Furthermore, if I swith the voice off as well (airplane mode)
now I have to wait few minutes for GPS to lock..

from this I conclude that AGPS does use voice connection..


well, now, I'll double check these observation in the course
of nearest few days..