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I've upgraded to iOS7 on my iPhone 4s. The keyboard, regardless of what I am doing, either texting or entering email, is extremely sluggish - 5 second interval between keystrokes.

What are some ways to troubleshoot this problem?

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    Thank you Apple! You have succesfully turned my Iphone 4s from a smartphone to a very dumb phone. Updated to IOS 7 operating system and now have to wait 6 seconds between keystrokes to send a text or search the internet. I would wait to update. – user57412 Sep 18 '13 at 22:45
  • I notice that typing in the setup assistant on an iPad 3 (same era hardware) does lag as my customary typing speed seems too fast for the software to capture. I'll see if I can find anything helpful like putting the device in instruments from Xcode to see if I can tell if the CPU is loaded or it's just going to need optimization and a patch from Apple once they can measure the parts that are slow in practice. My typing is more like 5 characters per second instead of 5 second pause between FWIW. – bmike Sep 18 '13 at 22:49
  • I also have an iPad 3 and found that by doing a completely clean install on it did improve the typing speed. Be aware that I did not restore the device and rather set it up from scratch. It is however still sluggish from time to time. – Alain King Sep 19 '13 at 9:12
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Try Settings > General > Reset all settings. I was having the same problem and that fixed it on my 4s.

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    Exceptionally useful. I was getting 5-15 second lag on everything I typed on my iPhone 4. After resetting all of the settings, it's almost back to how fast it was on iOS 6 and more than usable. – John Wordsworth Sep 19 '13 at 11:48
  • Confirmed that this worked and also fixed a similar problem typing in the password on the lock screen which was unusable, on my iPhone 4. THANK YOU!!!! – Andy Dent Sep 20 '13 at 9:14
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Try turning off "Documents and Data" in iCloud. It should make typing faster. You can turn it back on, but if you go to iCloud Storage and Data, it will start lagging again. You then must turn off "Documents and Data" once more.

This info was in the comments of this review: http://www.gottabemobile.com/2013/09/18/ios-7-iphone-4s-first-impressions-performance/

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I am going to attempt this on my iPad 3 and my iPhone 4 since they both are clearly slower at responding to keyboard input on iOS 7 than they were on iOS 6. I half expected the iPhone 4 to my laggy the first few days and it it. I wasn't prepared for the iPad to stutter so much.

Here is what I've learned:

My backup that I loaded was slowing the device down a little, but much of the slowness persists when I erase all content and settings.

This happens on both the iPhone 4 and iPad 3. It's not horrible once the OS is done getting all the pop up messages, apps updated and things generally settle down. For the first few hours, my typing was definitely getting truncated. Passwords I've typed hundreds of times (and thus quite quick) would miss letters and be rejected initially.

After a night of charging and all the apps updated, the iPad has all the apps from an iCloud restore and all the settings intact. The iPhone 4 erased all content and settings and have only enabled a few things like iTunes Match, podcasts and mail accounts (iCloud x2, Office 365 x2, IMAP) and the usual Messages, FaceTime, and core apps that ship with iOS.

I plan to see if iBooks and the rest of things slow down the iPhone 4 too much for me and make a call next week to sell it / keep it at iOS 6 or tough it out on iOS 7 in hopes that some or all of the "slowness" gets tuned away.

I do expect Apple to get a lot of real world metrics from bar appointments, troubleshooting logs and misbehaving app crashes to get things tuned up better - but that doesn't help me today. Sometimes, but not all the time, the keyboard is lagging half a beat or more when it did not used to nearly as often.

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