S. No. | Characteristics | Classifications |
1 | Frequency of use | Non-regular use (<1.5 years) Regular use (>1.5 years) |
2 | Life-time years of use | ≤1 Years - 3 years> ≤3 years - 5 years> ≥5 years |
3 | Number of calls per day | Dialed calls Received calls |
4 | Hours of use per day | ≥1 hours <1.5 hours - 3 hours> ≤3 hours - 5 hours> |
5 | Mode of use | Ringing mode Vibration mode Both (Ringing + Vibration) |