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Continue to Chat525m smartphone subs in Sub-Sahara Africa by 2020 https://gadget.co.za/525m-smartphone-subs-in-sub-sahara-africa-by-2020/
525m smartphone subs in Sub-Sahara Africa by 2020 https://gadget.co.za/525m-smartphone-subs-in-sub-sahara-africa-by-2020/