Q: iOS 10 phone app locks up
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Sep 18, 2016 4:17 PMby elcpu,HelpfulTry holding down these buttons at the same time for at least ten seconds, until the Apple logo appears: a) the Sleep/Wake button and the Volume down button (iPhone 7 and iPhone 7 Plus) or b) the Sleep/Wake button and the Home button (all other models)
If a restart does not help try a System Restore. First backup your device using iTunes. Also import your photos to your computer and copy all important data if possible. Try restoring from backup first and testing it. If it does not help, you may have to restore as New and reconfigure from scratch as the backup could be corrupted. For this reason it is important to have your photos and data saved separately from the backup. Here are the steps for a Restore:
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Sep 18, 2016 4:17 PMby jtmo3,HelpfulYes, most definitely. It's been very annoying. I've reset, reinstalled with ipsw and still the phone app will lock up. Don't know how you screw up a phone app on a "phone", but they managed to do it. I will get a call, talk, then hang up and go to use the phone again and it's locked up. If I minimize or close the app and then reopen it, it usually works. But really. Using a 6s btw.
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Sep 18, 2016 5:22 PMby nigelb999,Yes it's extremely frustrating. I'm using a 6s too. If you do manage to find a solution if you could post it here (I will do the same if I find the answer) as I use the iPhone to make phone calls all the time... (the phone being it's number one primary function) so this is not good enough really.
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Sep 29, 2016 3:06 PMby binaryni,There are at least 5 posts reporting this same problem:
https://discussions.apple.com/thread/7671180
https://discussions.apple.com/thread/7666112
https://discussions.apple.com/thread/7671366
https://discussions.apple.com/thread/7681132
https://discussions.apple.com/thread/7679372
"Phone" App keeps crashing under iOS10, reboot, reset do not help.
Apple, please tell me you are gonna fix it in 10.0.3!!!
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Sep 29, 2016 5:06 PMby binaryni,There seems to be a solution at "Phone" app freeze on iOS 10
Here is what I learned:
Basically, you need to go to Settings->Mail->Accounts->...
to disable the syncing of "Contacts" from those accounts.
The biggest culprit is Exchange server and Hotmail accounts.
Gmail accounts can also be the cause.
iCloud account should be fine.
It seems iOS10 has problem syncing Contacts from some of those servers.
