1. **State the problem:** We want to find the number of new mobile phone subscribers by 2025 for all regions excluding APAC and MENA, assuming current growth rates continue. 2. **Identify regions to include:** CIS, Europe, Latin America, North America, Sub-Saharan Africa. 3. **Calculate growth rates for each region from 2012 to 2020:** - Growth rate per year = $\frac{\text{Value in 2020} - \text{Value in 2012}}{2020 - 2012} = \frac{\text{Change}}{8}$ years 4. **Calculate growth rates:** - CIS: $\frac{239 - 195}{8} = \frac{44}{8} = 5.5$ million/year - Europe: $\frac{473 - 438}{8} = \frac{35}{8} = 4.375$ million/year - Latin America: $\frac{521 - 405}{8} = \frac{116}{8} = 14.5$ million/year - North America: $\frac{315 - 260}{8} = \frac{55}{8} = 6.875$ million/year - Sub-Saharan Africa: $\frac{543 - 294}{8} = \frac{249}{8} = 31.125$ million/year 5. **Calculate number of years from 2020 to 2025:** 5 years 6. **Calculate new subscribers from 2020 to 2025 for each region:** - CIS: $5.5 \times 5 = 27.5$ million - Europe: $4.375 \times 5 = 21.875$ million - Latin America: $14.5 \times 5 = 72.5$ million - North America: $6.875 \times 5 = 34.375$ million - Sub-Saharan Africa: $31.125 \times 5 = 155.625$ million 7. **Sum new subscribers for all included regions:** $$27.5 + 21.875 + 72.5 + 34.375 + 155.625 = 311.875$$ million **Final answer:** There will be approximately **311.88 million** new subscribers by 2025 in regions excluding APAC and MENA at current growth rates.