An ad is coming on my home screen .

[Android Central Question]

I have not used this app since I bought my phone.

 

[B. Diddy]

Welcome to Android Central! Which app? Popup ads are due to adware that typically gets installed alongside some other app (often a game). Uninstall your apps one by one until the problem goes away. See also this guide: https://forums.androidcentral.com/a...-screen-ads-how-find-culprit.html#post6296208