About running app on my iPhone

How to overcome the situation shown below on the pic.

You need to go into settings and “trust this device” for development

I’m not sure about the invalid signature

You can create a free Apple developer account and connect it with your Xcode

How to explicitly trust to the device and in which settings?
Now am using Xcode 12.1.

In the iPhone settings

But I’m not sure if that’ll fix your issue, but maybe!

Yes, it’s fixed. Thank you.