STOCKHOLM--(BUSINESS WIRE)--Regulatory News: Seamless (OMX: SEAM) has received an order from a leading African mobile operator group for the installation of its transaction switch. The contract means Seamless enters into the strategically very important Nigerian market, which is the largest economy in Africa, and is strengthening considerably its market position in Ghana. Installing Seamless’ transaction switch platform ERS 360°, will enable the mobile operator to distribute electronically airt