Hello, and thanks for your feedback! This functionality exists today in both our InsightGO and Insight Classic products.
In InsightGO, click on the magnifying glass in the upper left corner, where you can search by patient phone number, in addition to patient name, DOB, and PID.
In Insight Classic, open the Client Editor and click on the binoculars symbol next to the client name, where there is a phone number field that you can search.