By Soyoung Kim, Sophie Sassard and Michelle Sierra NEW YORK/LONDON (Reuters) – Sprint Corp has lined up eight banks to finance its proposed acquisition of T-Mobile US Inc, edging closer to a deal that would merge the third- and fourth-biggest U.S. mobile operators, according to people familiar with the matter. The debt package exceeds $40 billion and includes a bridge loan of roughly $20 billion from Japans Softbank Corp to Sprint, as well as some $20 billion refinancing of T-Mobiles existing debt, the people said this week. Five global banks – JPMorgan Chase Co, Goldman Sachs Group, Deutsche Bank AG, Bank of America Merrill Lynch and Citigroup Inc – have agreed to finance Sprints proposal to acquire the smaller rival, the people said.