@darius2, you seem to have a problem understanding what A-GPS is. ___ I can assure you I don't have any problem and I am fully aware how does A1GPS and A2GPS works and developed such solution for LBS some time ago. ___ A-GPS is a way, using network capabilities of your phone (or wifi) to have a clue of where you are, and then give this info to a GPS chip to get the fix quicker. ___ There are at least 3 AGPS solutions. One in no-gps iPhone (Skyhook) - network database based pseudo GPS Second is A2GPS for devices with slow processor, slow gps chip and Third is A3GPS for Sirf III like gps chip based devices. ______ As both in N810 and new 3G iPhone we discuss A2GPS _________ Both N810 and iPhone have a GPS chip, and they both could give you your position without A-GPS. A-GPS only comes there as a support. ___ exactly support to non-Sirf III gps chip like quality The N810 has a Texas Instrument chip, which is not so good to get its first fix but is good for other things(battery life, keeping the fix,...). To make the first fix quicker, Nokia introduced, as software, A-GPS. It improved the TTFF for most of us. Same goes for the iPhone. ___ Exactly. A2GPS solution. So what about A3GPS ? keep network assistance alive and offer Sirf III gps chip alike quality ? I expect, lately announced release of new iPhone is exactly A3GPS solution (network assistance + Sirf III like navigation quality). I still remember poor gps quality in Motorola A1000, called aGPS (developed 5-6 years ago) _____________ Now, as your question is: why didn't they put the best GPS chip (aka SirfIII) in the N810 and iPhone? ___ Not best. Sirf III gps quality is market standard nowadays. __ it's like asking "why didn't they put a Ferrari engine in my VolksWagen?" __ Nope. And asking, us or Nokia about that is as pointless as asking VolksWagen. They made the choice they thought was the best.