Originally Posted by
DeafFlyer
If you turn off cell data, wifi, and bluetooth yourself, rather than use "Airplane Mode" is it not the same thing as airplane mode but with GPS not disabled? He did say with WIFI on though.
No it is not, the phone is still searching for a cell tower signal as disabling cellular data does not disable all cellular activity.
Then only proper way to use GPS on an iPhone is removing the sim card and manually disabling wifi/bluetooth.