tru0c tjen may' co' s0ng' ma` k0 g0j du0c. co' nhju` nguyen nhan nguyen nhan thu' nhat va` quan tr0ng. nhat' can` faj lam` phan` mem` thu' 2 kjem tra l0c. phat' sw anten thu' 3 m0j' la` c0ng suat' chuc ban thanh` c0ng nha !!!