| Exp. | Operator | Min | Max | Median | Range | Mean | Variance | SD | CV |
| 1. | Halotel | −59.0 | −51.0 | −51 | −8 | −51.9 | 0.387 | 0.622070 | 2.03 |
| Tigo | −79.2 | −71.2 | −77 | −8 | −76.2 | 2.279 | 1.509668 | 8.2 | |
| Vodacom | −65.0 | −51.0 | −61 | −14 | −60.1 | 1.569 | 1.252845 | 4.74 | |
| Airtel | −65.0 | −58.4 | −63 | −6 | −62.7 | 0.487 | 0.697729 | 2.78 | |
| 2. | Halotel | −59.0 | −53.0 | −57 | −6 | −56.2 | 0.4328 | 0.657856 | 2.32 |
| Tigo | −69.2 | −69.2 | −69 | 0 | −69.2 | 0 | 0 | 0 | |
| Vodacom | −63.0 | −51.0 | −61 | −12 | −60.9 | 0.1333 | 0.365161 | 1.40 | |
| Airtel | −63.7 | −58.4 | −62 | −6 | −62.1 | 0.0619 | 0.248838 | 0.98 | |
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