HTC, Samsung and LG are poised to launch new Windows Phone Mango devices in September, DigiTimes reported on Friday. HTC’s handsets will be equipped with displays sized between 3.8-inches and 4.7-inches and will be powered by Qualcomm CPUs clocked at 1.5GHz. We’re expecting at least two of HTC’s new phones to be the Ignite and the Prime, which leaked again yesterday. Suppliers also indicated that Nokia will launch its first Windows Phone Mango devices during its annual Nokia World conference in October. Acer, Fujitsu-Toshiba and ZTE are also preparing to launch new phones in the coming months although it is unclear when those devices will hit the market. Microsoft announced on Wednesday that the final Windows Phone Mango build had been released to vendors.