In the Guardian:
Grasping his mobile phone, Abdirizak Yussuf Mahmoud prowls the Mohamud Haybe livestock market outside Hargeisa, the capital of Somaliland. A camel catches his eye and the bargaining begins. He shakes the hand of the trader, haggling in a silent code. Pinching an index finger adds 1,000 dollars to the price; grabbing a hand means 5,000 more.
Once agreement is reached, the handshake is broken. A quick chat confirms the details, before the sale is completed by mobile phone. No cash changes hands, no papers are signed. Instead, Yussuf Mahmoud types into his handset, the seller's phone chirps, and the deal is done.
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