Quote:
Originally Posted by aspalaasn
I was under the impression that AGPS is does not use data although some say it does...how did you turn AGPS off? Like do you mean in the registry and then soft resetted? or do you mean you just turn of data thereby disabling AGPS?
For me, I have faster locks, see more sats and more locks with data on than when it is off. Whether that's due to AGPS or not, I know there's a difference. I'm in Vancouver, Canada if that makes any difference, on Bell as well using 20273 rom made from the kitchen. I tested pretty much with iGO8/OCN8 only and look at the sat viewer. With data on, I'd be getting 6-9 sats locked and they were of strong strength but with data off (blocked by no data) the most I would get after a cold start is only 4-5 locks, avg is closer to 2-3 locks only. It would also take forever to get a lock but it does lock. That's why I think data is needed for better GPS signal. Whether that's AGPS or not I'm not sure, if it is, then I guess AGPS needs data, if not then like I said in other posts, there's something else that affects the signal we get.
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Here's a good
tutorial on GPS vs aGPS - I didn't know much about it before I read it. Whether this would incur a data charge when I'm roaming in Canada depends on a) what aGPS configuration the vogue works on, and b) whether the cell tower - phone communication occurs over the data line or not. Your testing would suggest that the cell tower "assistance" is using a data route.
I turned off aGPS by using a program called Advanced Config. It is included in many custom roms, can be dl'd too. I also turn off my data when I go to canada by preventing data while roaming - for reasons other than just the aGPS. The only thing I've found with iGo8 is that with aGPS and data off, I typically need to soft reset before using it or it won't get a lock, don't know if this is because it is trying to use old sat info, or because I just got impatient the first couple of times and then began soft resetting after that. But yeah, I would get a lock in about 2-4 minutes with that config, and dropped sats about every 10 mins for 20 seconds or so.
But your testing might also indicate that I don't kneed to turn off aGPS, I can probably just block my data connection and have the same results. I thought that maybe the phone would be "searching" for that assisted information and then maybe not function at all; apparently that's not the case.
Definitely while I'm home in the US I keep aGPS on, and have seconds to a sat lock and almost never drop a signal. I only disabled it cause I was going to Canada.
I did not try simply disabling data but leaving aGPS on, as I assumed it wouldn't work anyways. The next time I go to Canada, I will give this a try, and see if I lose satellites all the time and/or if my TTFF dramatically improves; from what you say, though, it's probably the equivalent of turing aGPS off.