the secret with a wifi only ipad i use one by the way,is before you plan to go out for a days flying, just check for any updates while you have an internet connection at home, i say this because back about 6 months ago when i first started using my ipad, after changing from an android device, i went out to fly in a very out of the way area where there was no wifi or even cell connection on my phone, upon setting everything up to fly as it was all linking up i got a firmware inconsistency message and it told me to update now, obviously i couldnt where i was and i was unable to fly there, i had to drive some distance to get a signal on my phone and do a wifi link to it to do the update , by this time the weather had changed and i had to abandon flying for the day, still lesson learned,i would not like it to happen to someone else hence this post