New to andriod

Welcome to the forum

Some android phones have an option to underline misspelled words. I don't know about the S4 mini, but the obvious place to look is in the Language and Keyboard settings.

The spelling correction is part of the keyboard app, so if the Samsung one doesn't do it well enough for you you could try a different keyboard (just download from the Play Store, activate it in the Language and Keyboard settings, and you can choose which one to use when inputting text using any app - look for a keyboard chooser in the notifications while typing). Swiftkey is very popular.

One thing to watch out for is that you can end up saving your mis-spellings in the custom dictionary - if you see your previous errors appearing as predictions, try pressing and holding on the prediction and you'll probably get an option to remove it from the dictionary.

 

The A.I. keyboard plus has a grammar AND spell checker built right into it. I have the paid version, so I can't remember if it works for the free version too, but it's FREE to try so you have nothing to lose. Here's the link for the Play Store.

https://play.google.com/store/apps/details?id=com.aitype.android.p&hl=en