shabbosabba cowculator the original question st1 was about a vn220. I answered the question for that phone.
Jumptoheaven st1 there is a way even without installing an app. Add another call, then flip the phone shut, and then open it.
Flippy cowculator As you said earlier, cowculator "It depends on the phone." Some phones though, ( Lg we are looking at you)... do need an app
cowculator shabbosabba Um... I don't think so. Depending on the phone, you can press the back key or go to Call Options>Show Idle Screen 'וכו.