Don't Install iOS 11.4.1 You're Worried About Problems
If you're having a flawless experience on your current version of iOS and you're concerned about iOS 11.4.1 problems, it might be a good idea to wait a few days before committing.
iOS 11.4.1 fixes bugs, but its brought its own set of issues to iPhone, iPad, and iPod touch owners.
The current list of iOS 11.4.1 problems includes severe battery drain, issues with first and third-party applications, finicky Bluetooth, problems with Wi-Fi and cellular data, installation issues, lag, issues with smart punctuation, random reboots, and missing battery indicators.
If you're feeling leery, you might want to wait for the next version of iOS 11 (if there is one) or Apple's iOS 12 update this fall.