ios 12 bug fix

Errors after upgrading iOS 12 and how to fix it
ios 12 update makes some users unable to access the appstore, causing the device to hang, unable to play wifi or sudden application error, etc.
How to fix the error does not reach the network on iOS 12.1.2
how to fix network errors on ios 12 will help you use 3g / 4g mobile network on the phone