Popover: If the information is some kind of dialog you could display it on tap.
Tooltip: If the information is a Tooltip you could display it on Press and Hold.
Example of Touch UI tooltips in a press and hold state
Hover state on mobile is not an good idea. If there is any info which is important, then make it clickable on mobile and show the information. In your case what I am assuming is that small "i" icon show information on hover on desktop and you want to retain that icon on mobile. I will strongly suggest to make it clickable on mobile because hover state will not be successful on mobile as the user finger will interrupt while reading the info.