894 Views 4 Replies Latest reply: Aug 4, 2007 9:25 PM by Matt Kulka
I believe that WiFi does also snooze during iPhone sleep to save on battery life. The GSM radio of course needs to remain active to accept calls from the cellular net... Now, I had assumed that it will use WiFi as needed, during sleep. There's no reason I can think of why it wouldn't, and it would make sense. But, if you want a definitive answer on this, you might test it with the SIM removed. Or maybe someone else here has already investigated this.
"if the sim is removed it wont work..."
Could you clarify what won't work with the SIM removed? All phone functions? ...I am curious because of the side discussion about airplane use where the carrier supports WiFi, and don't care to do testing on my iPhone... Someone suggested removing the SIM, to which I said that wouldn't meet federal regs. But I would welcome info from someone who has actually tested this.
BTW, sorry for the unintentional and partial thread hijack... Another thread can be started depending on the response.
Message was edited by: Chas Hulme
Yes, Wifi does sleep shortly after the device when on battery power. I've noticed that it doesn't (or at least as much) when plugged-in. The reason for this is, of course, power saving as the iPhone doesn't do anything on it's own (aside from checking your email at specified intervals and I believe checking for/fetching voicemails). It'd likely wake up the Wifi when those functions are needed.
Despite what I've read others' hypothesize, it does not automatically update Safari, Weather, Stocks or Maps while it's sleeping.