Kuwaiti telecoms firm Zain Group (ZAIN.KW), Qatar’s Ooredoo (ORDS.QA) and Dubai’s TASC Towers Holding said on Tuesday they had signed definitive agreements to combine their tower assets into a $2.2 billion entity in a cash-and-share deal. Zain, Ooredoo and TASC in July had announced exclusive talks to create the Middle East and North Africa’s largest tower company, combining about...