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https://projectresearch.co.kr/2010/02/05/iphone%ec%97%90%ec%84%9c-%ec%82%bc%ec%84%b1070-sip-%ec%86%8c%ed%94%84%ed%8a%b8%ed%8f%b0-%ec%82%ac%ec%9a%a9%ed%95%98%ea%b8%b0/
iPhone에서 삼성070 SIP 소프트폰 사용하기