When iOS 8 came out it brought with it some issues that have left owners of devices hoping that Apple will launch updates to fix the issues and bugs. Of course at the same time the OS did bring with it new features and some enhancements.
Apple then launched the iOS 8.1 update and with it came some fixes, so if you haven’t made the update to iOS 8.1 yet then we suggest that you do. You can also get help from the discussion forums of Apple through other users.
If all else fails then you could do a factory reset of the handset so that it wipes it clean and this has been known to fix a lot of the issues with iOS 8. However this is usually the last resort.
To fix issues such as WiFi, battery life and cellular data problems you can go into settings and choose reset all settings. This could make iOS 8 work better and could be an alternative to factory resetting.
If you are at your wits end and still having issues with iOS 8 then you could take the device to the Apple store and have them fix the issues for you.