Holding phone with your right or left hand?

I hold my mobile phone with left-hand while talking. No preference of ear thought - If I have to hear with my right hand, still I hold with my left hand.

While browsing on phone, I hold the mobile with my right hand and swipe with my left hand. Only because, most phones are designed (placing of power, volume buttons, etc) for right handed.

Only when I write/take notes or using my left-hand for some tasks, I hold phone with my right hand.

I have an office landline phone - I am in meetings over phone for at least 2–3 hours a day - I hold the phone with my left hand naturally. Also, the landline phones are designed to dial with your right hand.