How do you explain that?
iCloud backups require WIFI to work, and are not supposed to work over cellular data connections.
-Not doubting you BTW.
Quite frankly, I have lost trust in iOS6- and have no idea WTH it's doing with my data, WIFI (which is broken), or when it's supposedly sleeping.
When I hit the home button, I clearly see 4G first, and then it switch to wifi.
Of course on my unit, wifi is about 1/4 the DL speed it should be- directly compared to the 4S on iOS6.
There was an option in the beta's for wifi+cellular which if the wifi wasn't passing data the phone would use cellular data. It was removed in the GM build.
There are 2 possible theories I have stemming from this:
1. The rumor that the toggle for this setting was removed and the functionality was left and set to on.
2. Some remnants of code were left and it is causing issues that were not meant to occur.
Other theories that are unrelated to that option are:
1. Back up is starting over wifi but in iOS 6 wifi sleeps when phone is locked and for some reason backup continues on cellular.
2. Somebody at Apple screwed up the code and back up over cellular was some how allowed.
I am leaning toward one of the issues from the wifi+cellular feature.