Check your firewall and make sure it’s not interfering with the sync.Apple has a support page for Windows users using the built in firewall.To turn off Background App Refresh Open settings and tap General, then select background App Refresh, just toggle it off.If your device’s screen starts to lag after i OS 11 update or if it becomes unresponsive when using the i OS 11, here’s a fix that’s worked for us.Some users reported that their i Phone’s battery started to drain rapidly after updating to the latest i OS 11, if you’re experiencing this problem and wondering how to fix battery drain on i Phone, you might as well try the following methods.Potential Solutions: Turning off the Raise to Wake feature has been said to help some users.
In fact, allowing all your apps to continually update and refresh in the background is a sure-fire way to drain your i Phone battery.
Some users complained that their i Phone run slower and isn’t as nippy as it used to be after i OS 11 update.
If you are still using an i Phone that’s two or more generations old, like i Phone 5/5s/6/65s/6/6 plus/6s plus, then you may be troubled by this issue.
To do this, go to Settings , then tap Display & Brightness and toggle off Raise to Wake to disable the feature.
Taking time to update all the available app could seriously help with i Phone battery drain.