On the one hand, it’s good that smartphones come with AV pre-installed because everyone gets security at no extra cost - but some don’t like it because they want to have a choice of whether they want to use something or not. Huawei, for example, has
Avast AV in its devices as part of the Optimizer app - and considering the scandal the company has been in recently, I don't think their users are very happy with that fact.
In order to remove Avast, it is necessary to remove the entire Optimizer, and for that you need to have a rooted phone - which means loss of warranty.
The additional security that has been provided makes me happy and without having to spend any more money to buy an antivirus license that I have to install.
indeed some people are not happy with the antivirus features that have been embedded in smartphone brands for several reasons.
But for me it is a mandatory feature and should be there for security reasons.
Huawei currently has a big problem with Google. If Google Service is not available, some applications cannot run, but it can be solved by installing Google App Installer.
A rooted phone is not completely out of warranty. We can also Unroot when the application has been deleted.