By Helen Nyambura-Mwaura JOHANNESBURG (Reuters) - Millions of mobile phones are shipped to Africa every month, but a South African company hopes to rival the likes of Samsung and Nokia with home-grown smartphones tailored to African needs. Seemahale Telecoms, which already makes telecommunications equipment in South Africa, is set to build a model that looks similar to Samsung's Galaxy S4 and runs on Google's Android operating system, to sell at around 2,500 rand ($260). ...

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