anyway my question would be, if we have offline maps downloaded and SSH-ed into our phone...let's say i'm using the 2G variant, can i just use the tower triangulation thing to pinpoint my location?

i try to answer the questions, but i cannot guarantee i am 100% correct.

1) yes, you can pinpoint yourself with gps with offline maps, I tried go from wangsa maju here to pj, and i dun lose a single cent from my credit.

2) According to my experience and reading, somehow gps in iphone is using AGPS to work, with another word say, it uses tower to pinpoint location therefore the 3G or Edge must be enabled. So, when at plane, u cannnot pinpoint ur location i think. After all,when you in airplane are not suppose to send any signal out, it might disturb the plane functions ( you can try ask string bro about this, i not really sure myself)

You can try take off your sim card and see gps work anot, i modify my post earlier, because i always in car or somewhere where gps signal is hard to receive that y i use Agps, if you in open air, GPS can use even with everything is turned off (using bosspref)

get garmin or equivalent Satnav for car, else you really have to wait.

ya, compared to N95 my fren told me, not 1 but 2 of them said that if u use nokia routes, you hit wall already if u follow the instructions.

A good GPS will have appox 5m to 10m differences, Iphone have about 20m to 30m accuracy , but overall i tried , it very accurate.

If you are drivers, you not really depends on route, but rather take it as guide, of course when it say turn only u turn , you bang wall like N95 GPS lol