https://forum.gsm-developers.com/topic/20481-%D8%AA%D9%88%D9%8 | جی اس ام دولوپرز

https://forum.gsm-developers.com/topic/20481-%D8%AA%D9%88%D9%84%D8%AF-%D8%A7%DB%8C%D9%84%DB%8C%D8%A7-%D8%B9%D8%B2%DB%8C%D8%B2-%D9%85%D8%A8%D8%A7%D8%B1%DA%A9/