+ B?n c?p nh?t th? công k?t qu? v? h? th?ng c?a mình: (nh?p n?i dung tr? tin nh?n sms, nh?p vào d? li?u ?ng d?ng, nh?p vào World wide web k?t qu? x? s?..The toughest faults to discover are people who come about only Occasionally—intermittent occasions. They may be due to poor connections, dust, dirt, corrosion or just broken wiring or conne