Allow searching within notes and other details in contacts in addition to just contact name
I think searching in notes and other details would be useful. At least give an option to turn this on, if disabled by default. Currently people do this by adding more details directly to the contact name (a practice from old dump phones era). For example, if I want to list all contacts from a specific group (I may not remember their name), then we have to add the group name or other tips to the name itself. For example, I have to save contact as "A Free Software" "B X club" etc to be able to find them later.