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Discussion Starter #1
I may be the last person on Earth to know this but here goes...

For umpteem years I have been plugging my iPhone into the front of my desktop computer at night to charge. I have to take my dad to the doctor this morning so I had my phone charging last night. I grab it to go this morning and find the battery is around 20% and apparently it didn't charge.

There is a message on the screen saying to "Unlock phone to use accessories". Huh?

So a quick Google search returns that apparently Apple quietly released an update a while back that restricts the use of the Lightning port unless the phone is unlocked. It's called "USB Restricted Mode ". If you plug your phone into the wall to charge it won't really effect you but if you plug it into a computer or other device like I've been doing the restrictive mode can prevent charging. It's funny I never saw this in the "What's new" stuff that scrolled on my screen during recent updates.

Anyway, it is easy to turn off in Settings and return to normal use of USB devices but unfortunately I currently have to hit the road with a 20% battery.

Thanks Apple. :-(
 

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I noticed that some time back, but only on the normal USB ports on my laptop.
I have one on the back that has the same connectivity as the others, but is powered all the time, as long as the laptop is plugged in.
My Iphone 8 charges fine on it.

BTW, the usb charging output has a lot to do with that mode too. Some standard USB ports dont give enough to charge at a decent rate, and if the phone doesnt detect enough charge, it wont charge. Seems like a bad thing, but keeping batteries healthy is sort of a science, and the wrong charge rates can do more harm than good.
I am not saying thats the issue here, because I have no idea, but I know that this is a problem with some phones.
 

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This setting is difficult to find unless you know where it is. It's found under Settings>FaceID or TouchID & Passcode>USB accessories. Toggle to green if you want access all the time.
 

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This setting is difficult to find unless you know where it is. It's found under Settings>FaceID & Passcode>USB accessories. Toggle to green if you want access all the time.
Or for those with a phone without FaceID:
Settings>TouchID & Passcode>USB accessories
 

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Or for those with a phone without FaceID:
Settings>TouchID & Passcode>USB accessories
Edited my post to include that. :thumbup1gif:
 

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Discussion Starter #7
BTW, the usb charging output has a lot to do with that mode too. Some standard USB ports dont give enough to charge at a decent rate, and if the phone doesnt detect enough charge, it wont charge. Seems like a bad thing, but keeping batteries healthy is sort of a science, and the wrong charge rates can do more harm than good.
I am not saying thats the issue here, because I have no idea, but I know that this is a problem with some phones.
No, not the issue. Been using the same phone and computer for 4 years.
 

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:munch:just glad i don't have to use or have one of them fancy dancy iphones. :lol:jeepers-i would be lost for sure.:banghead:
 

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I don't do iPhone, but I believe this may be related to some recent articles I've read about the risks of using public charging stations. It has been documented that some of these stations are using data cords instead of power only cords so they can tap in to your phone and steal info.
 

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I don't do iPhone, but I believe this may be related to some recent articles I've read about the risks of using public charging stations. It has been documented that some of these stations are using data cords instead of power only cords so they can tap in to your phone and steal info.
This isn't the related item although it is a security fix. It was added back in July's update and here's an article that explains the specific security 'fix' that it provides... How iOS 11.4.1 limits USB accessories to make your iPhone and iPad more secure - 9to5Mac


If you look at the plug on the end of a USB cable (the larger end that plugs into your computer), you should be able to see that there are four distinct contacts along the little circuit board. The two at the outer edges are the ones that provide power while the two toward the middle handle data communications. A charging device only uses the outer two and that's how a device like a phone can tell the difference between whether they are connected to just a charger or to a device like a laptop or accessory that needs the data connectivity.

I would suggest you give consideration before simply turning this feature off. If your device is lost or stolen, this feature being disabled continues to allow someone to connect your device to a system with "hacking" software installed that makes it much easier for someone to attempt to crack your passcode. If you've ever forgotten your passcode and tried to unlock an iOS device, you know that, after a few tries, the device starts adding longer and longer delays after a failed passcode entry. This makes it basically impossible to go through all of the passcode choices. This feature allows your device to have this time delay removed by the "hacking" software. So, someone that wants to break into your phone can just keep trying passcodes without any slow-downs.

If your phone was unlocked within the hour prior to when you connect it to a PC or similar, it will work exactly as it always had.

While computers are capable of charging devices over a USB port, it's painfully slow compared to using the actual charger. The current rate is no more than half what a charger can put out (USB ports are restricted to 2.5A). Most chargers are capable of at least double that rate which cuts your charge time significantly.
 

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.....
While computers are capable of charging devices over a USB port, it's painfully slow compared to using the actual charger. The current rate is no more than half what a charger can put out (USB ports are restricted to 2.5A). Most chargers are capable of at least double that rate which cuts your charge time significantly.
I recently had to change phones because my old S3 didn't completely survive a 5' drop onto the patio pavers.... :banghead:

So i grabbed the old perfectly fine S4 my wife discarded because she needed the new fancy gadget and loaded my stuff onto it. The only place i don't get a slow charging message is when i plug it into the charger in my truck. The laptop, three different plug in chargers in the house and the car USB port all give the slow charger message. My S3 doesn't give that message, just since using the S4.
 
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