USING CELL DATA WHILE ON WIFI

I don't understand.

Is there a question in there somewhere? Or are you just benefitting us with this arcane bit of trivia on the inner workings of the phone?

Cause Apple doesn't read these forums. Except for the invisible moderator who's only apparent job is to zap you if you get out of line. We're just ordinary customers with nothing better to do to while the time away. What we may think or do is of little concern to Apple (provided we continue buying the goods).

When you read, do you comprehend what the written words mean?

APPLE DOES NOT READ THESE FORUMS.

You can b!tch and moan here till you wear your fingers down to the knuckles, won't make a difference.

You can try using the feedback forms and see if someday something happens: http://www.apple.com/feedback/

The fact that, unless the phone is connected to a power source, it drops WiFi in favor of cellular is neither news nor a bug. It is working as intended. It has also been the subject of much discussion on these forums. Multiple posts with subject lines all in caps (considered rather rude) are not necessary. Adding references to this thread in threads that have been dormant for two years just clutters up the forums unnecessarily.

Yes, it helps a little with the information.

But in fact, the cellular data screen also appears too if one is not using the SMS services on iPhone 3G.

I meant MMS. 😁

Logically, your explanation makes sense; however, I have two iphone 5's that are both updated to the latest software version (6.1.3). Why would one phone still exhibit the issue while the other wouldn't?

Also, when you mention "Whenever the auto lock is set, the device will go into sleep mode. When this occurs, the device will disconnect itself from Wi-Fi as a battery conservation program written in the source code. During this mode, any app that is working in the background, or any update by the device itself will use cell data"

Can I kindly ask where you read this? Are there any Apple engineers that can claim this or documentation you might be looking that that can back up this functionality that you claim?

Your analysis of how the iPhone handles WiFi is incorrect.

While I don't dispute your claim, simply stating someone's post is incorrect is meaningless. Provide the correct information, or a link if it's already been posted. That would add some value to those of us who don't live in these forums.

Off to search for the (hopefully) correct info...

IIRC, the phone prioritizes WI-FI over celldata always. So, for any and all types of data transfers, if you have a Wi-Fi link, regardless of whether on the power brick or not, data will be sent over it instead of the cellular link. Even if the Wi-Fi link is 1000 worse than the cellular (common case nowadays in 4G/LTE-blessed regions). VoIP phone calls (Skype, Cisco Jabber, etc.) are treated as data and routed as such. Regular phone calls will come thru the cellular link. That takes care of where the stuff comes from.

When the stuff comes over depends on the status of the phone and its config. If sleeping (dark screen), MOST apps are dormant and don't send or receive data. Some apps CAN receive data then, like GPS apps, Mail, IM, etc., provided they are configured for push operation.Phone calls ALWAYS come thru. Exceptions are: if the phone is "off", if on Airplane Mode (all radios off) and, possibly, in Do Not Disturb mode, depending on its configuration.

Lastly, "off" may not be as terminal as it sounds. Those of us who have dealt with security believe that even an "off" iPhone can be contacted/located/activated by the Mother Ship. An inevitable consequence of these modern phones with unremoveable batteries.