On your phone or tablet, you can use the global search to lookup a phone number in Upvise.
The global search is accessed through the left sliding panel. On Android, tap the search/magnifier icon in the top bar. On iOS, tap the Search menu.
This searches across all applications in Upvise, and in all fields of data items. If you type in a phone number, it will find the corresponding contact or company, or a Note containing the phone number.