iOS 10
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BB - with iPads you have a choice of either a 3G model (or 'cellular' as they are often called) or wifi only.
If you go for the 3G/cellular version, then you need a sim card.
Only the 3G/cellular versions have a built in GPS. The wifi versions can get an approximate position using their wifi function (I believe they do it by triangulation) but it's only approximate and dependant on wifi.
iPhones are obviously all 3G/cellular and all have GPS built into them.
So why didn't I buy a 3G version of the iPad? Well, because a) they are more expensive, b) you have to have a sim contract, so more monthly costs and c) the GPS isn't very accurate or reliable (I believe it relies on the 3G signal and as I use it for navigation
while flying, that isn't at all reliable!).An external GPS is far more accurate and reliable - normally! The Garmin GLO receives both GPS (American) and Glonass (Russian) satellite signals and it also updates itself 10 times per second, apparantly.
But it seems to have been defeated by the Apple corporation!
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Just a small point to add to the above. You don't have to have a SIM card installed in an cellular iPad for the GPS to work. I'm running CoPilot SatNav software on my iPad Mini and the GPS works with no SIM installed.
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