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Room 606, Huafeng Baoyuan Building, Baoyuan Road, Xixiang Sub-District, Baoan Dist., Shenzhen, Guangdong, China (Mainland)
gsm module sim300, US $ 10 - 50 / Piece, GJ200, MC35, GJ, Guangdong, China.Source from Shenzhen Guo Jue Electronics Co., Ltd. on Waimaotong.com.