iPhone 6 very slow with IOS 11 update

After receiving IOS 11.01.1 on my MGCT2LL/A1522 (iPhone 6), my phone is super slow. Apps hang, then close (like the Starbucks app), my purchased music would just stop in the middle of a song, then I had to close the app and re-open.

In general, everything is very slow to respond, and I have rebooted twice.


Any suggestions

Posted on Oct 1, 2017 5:02 PM

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Posted on Apr 3, 2018 11:22 AM

Replacing the battery is the only way for your phone to regain full performance - and that at all battery load levels.

I just had this done this morning. Now my phone runs at the nominal CPU frequency (1400MhZ) just like when it was new.


There is no "big mess" to solve. All Apple did was to gradually reduce CPU speed as the battery degraded to protect it and extend its life (and prevent sudden phone shutdowns).

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iPhone 6 very slow with IOS 11 update

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