For the year ended 31 march 2013
| 2013 | 2012 | |
|---|---|---|
| Rm | Rm | |
| Total revenue | 33,119 | 33,668 |
| Operating revenue | 32,501 | 33,079 |
| Other income (excluding profit on disposal of property, plant and equipment, intangible assets, investments and profit on disposal of subsidiary) | 317 | 351 |
| Investment income | 301 | 238 |
| Operating revenue decreased mainly due to a reduction in retail voice revenue due to lower usage and retail rates. Interconnection revenue also decreased due to lower rates and volumes. These were partly offset by an increase in mobile revenue due to growth. |