Softbank Corp, Japan's No.3 wireless carrier, said it will add to its lineup its first phone using Google Inc's Android operating system in the spring, following similar launches by NTT DoCoMo and Verizon Wireless. Softbank CEO Masayoshi Son declined to say on Tuesday who will manufacturer its Android phone, but said the phone would feature an OLED (organic light-emitting diode) screen and that it had yet to go on sale.