Don't think there's much implication of batteries causing something signal related. As for signal, its strength can depend on a whole variety of factors or combinations of them, which is kind of neither here nor there as far as the effect on battery that can result in--in this particular discussion the cause isn't of so much importance as compared to the effect of the resulting low/bad signal on the battery.
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IPhone 7 battery life on 10.3.2
- Thread starter chillip
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The main question in this thread was about signal strength in outback areas with low network coverage. It's strange when my iPhone 6 has lower signal strength than an old Ericsson phone with one third of the iPhones battery power. I'm not talking about differences between iPhones,as all are built to match basically the same radiation regulations,which limits the transmitter power. In the 19990s there where no such regulations for cellphones,so that's why old phones work better in rural areas. The old r232 shark fin phone,discontinued in 2002 or so,is still widely used by timber jacks,logging machine operators,farmers and fishermen in outback areas here,as it has better power and therefore less connection problems when working in the wilderness.
The comment you originally replied to when you quoted my post was part of a more specific discussion related to the effect low/bad signal can have on the battery usage, not really about anything beyond/outside of that. Unless you perhaps meant to quote another post, or perhaps not even quote any post at all and simply reply to the thread in general.
No. As I have already stated.
When you have low or no service. The phone continues to automatically search for a signal or stronger signal. This uses the battery. It's literally that simple. Any time under 3 bars, the phone will continue to search for a stronger signal. It has always been this way.
Low service = poor battery life.
iOS even reports when you have low service and it's draining your battery. Under battery it will say "low/no service".
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How is any of this relevant to the topic at hand?
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Oh okay. Makes sense. Thanks. I'm sure I'll have to upgrade to the latest version eventually. But I'm just hesitant on this one more than in the past. Same with OSX. I'm still on El Cap.
This is exactly the kind of thing that should be reported to Apple. Please send them feedback or use the Feedback app if you have a beta installed.
I can understand a penalty to battery life when trying to use the phone in a low signal area, but it absolutely should not be happening overnight when in stand-by and especially not to that extent!
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10.3.2 is fine for me too. In fact it's as good as it's ever been. I'm pretty hardcore about turning off stuff I don't want or use though.
My 7+ got 12 hours of use on 10.3.2 last time I tested (see log).
I'm now on 10.3.3 beta 2.
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Have you not read this thread? This is not a bug. All cell phones do this. Phone automatically search for stronger signal, therefore it uses the battery.
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You beg to differ that every single phone for the last 20 years has done this?? This has already been discussed. Please reread the thread.
I'm getting terrible battery life on my SE using both 10.3.1 and 10.3.2
It's really noticeable, I wish I had never updated it.
It's really noticeable, I wish I had never updated it.
The simple issue is that in a weaker signal area the iPhone (or ANY phone), has to crank up its transmit power to stay in touch with the cellular network. More transmit power = more battery usage.
Unless you select Airplane Mode this happens even overnight or when you are not actively using the phone, the cellular components carry out handshaking to stay on the network in case you receive a call etc etc...
As they say, its just physics. And as C DM states, it has been the way since cell phone #1
I wonder if the battery drain issue in 10.3.2 is related to the modem firmware being downgraded in 10.3.3 beta.
I have checked on iOS 11 Dev Beta 1.
The battery life is better than in 10.3.2.