Currently Being ModeratedAug 7, 2011 10:34 AM (in response to lmgrg)
Thanks, but does anyone know why and can someone point me to Apple's reasoning for this?
Probably to save battery.
Apple does not make a habit of explaining their reasoning, like most companies.
Why is not a question that can be answered here.
Currently Being ModeratedAug 7, 2011 12:20 PM (in response to lmgrg)
It is definitely to save battery. Maintaining an active WiFi connection when the phone is in standby would reduce the standby life of the phone to about 10 hours at best. In other words, if you start with a full charge when you go to bed, by the time you get up in the morning, the phone would be near to shutting down on its own because the battery was exhausted. If it is connected to a power source, it will keep the WiFi radio active and connected when in standby, but not when running on battery power.
Currently Being ModeratedAug 8, 2011 6:45 AM (in response to lmgrg)
Why, exactly, do you feel it's doing 3G data transmissions at night? If you're basing that on reporting from your carrier, you need to know that the session times on your statement are NOT necessarily when the data transfer occured. Depending on the equipment, what you're seeing may be a batch reporting job that happens several time or even once a day. This may actually be an agregate of data that was transmitted during the day while on the 3G network.
Currently Being ModeratedAug 8, 2011 7:16 AM (in response to KiltedTim)
Yes, I am basing it on my carrier's report because the reporting of my text messages and data usage throughout the day is right on the minute. Therefore, I am assuming the data usage during the night is accurate also.
At this point I have resigned myself that this is the way the phone works. Now I am currently turning on/off select APPS at night to pinpoint the culprit. When I turn them all off, no data is sent.
Currently Being ModeratedAug 8, 2011 8:01 AM (in response to lmgrg)
The assumption that the data reporting times are correct is... well... incorrect. The equipment is most often set up to report data transactions in batches. Otherwise, the system couldn't handle it. A single e-mail send/receive session could actually be several transactions. Multiply that by all the smart phones on the cellular network and the system would quickly implode.
How much data are you seeing in these mysterious night-time transfers?
Currently Being ModeratedAug 8, 2011 8:55 AM (in response to lmgrg)
WiFi should remain connected in sleep mode while the iPhane is connected to a power source. I did some testing on my iPhone 4 and verified this behavior. As for unexplained early morning data useage there is a very, very, verly long thread dedicated to this.
Currently Being ModeratedMar 13, 2013 10:30 AM (in response to lmgrg)
This crap just happened to me this morning where I was sent 90% data plan threshold warningfrom AT&T (while sleeping at 7:09am) then 5 minutes later getting the Overage data plan warning from AT&T. This is all while I'm asleep right next to my phone plugged into a (non-Apple) dock on my clock radio.
Android has a limiting feature, why can't the "smart" guys at Apple learn from this??