BANGALORE/FRANKFURT, May 29, (Reuters) – Deutsche Telekom AG DTEGn.DE has agreed to a plan by Japanese mobile company Softbank Corp 9984.T to buy T-Mobile US Inc, the fourth-largest U.S. mobile carrier, Kyodo news agency reported, citing industry sources. Softbank Chairman Masayoshi Son proposed the buyout in a meeting with top executives of T-Mobile and Deutsche Telekom in mid-May and received a positive response, Kyodo reported. Softbank owns Sprint, the third-largest carrier, and Deutsche Telekom owns 67 percent of T-Mobile.