Agence Ecofin writes that Tigo Senegal, a wholly owned subsidiary of Millicom International Cellular (MIC), is expanding the footprint of its 3.5G mobile network into the country’s interior, providing customers in the cities of St Louis, Louga, Fatick and Diourbel with ultra-high speed mobile internet. The service expansion builds on the operator’s XOF110 million (USD191,969) initial investment in evolved 3G services in the country, which has already helped to bring improved mobile surfing to Tigo subscribers in the cities of Dakar, Touba, Mbour, Thies, Kaolack and Ziguinchor.