In article , p-0''0-h the
cat (ES) wrote:

"Assisted GPS can help avoid this, solving the data connection issue by
linking to a web-based internet server (known as an assistance server)
that already holds the current satellite information. This information
is relayed to the device using GPRS (cellphone data connection service)"

that doesn't say what you think it does.

Pray tell me what "This information is relayed to the device using GPRS"
really means then.

it means it's *sent* over gprs (or hspa/lte).

it does not mean that there's a two way exchange.

an agps device *receives* the data. an agps does not *send* anything.

Even if that was true, which it isn't,

it absolutely is true. see below for proof.

in order for the base station to
send data to the client the client device must register with the
cellular network. Does that occur by magic or does the client device
transmit to achieve that? Please say it doesn't transmit and prove you
know shag all about cellular networks. Please tell me it authenticates
using telepathy...

it doesn't transmit anything.

it obviously connects with the network but that's it. nothing is *sent*.

more importantly, there is no tracking information even if there was a
request for ephemeris.

i have an ipad with a gps and cellular radio but the cellular radio has
never been activated *ever*, yet it gets a gps fix almost instantly,
and in an area where there is no wifi.

explain that one.

how can it send a request when there's no active service plan?