I sometimes have lag problems, but that’s only when I visit the “Apps” section in settings.
Do you have any of those crap cleaning apps like clean master etc. All will slow your phone and causes overheating as will any anti virus apps both are not needed so deleting them will help. As will cleaning the cache from the settings monthly, factory reseting the phone annually and not using it when it is charging. If you want more info: - [https://ifixmobiletoronto.ca/|https://ifixmobiletoronto.ca/]