As of January 2015, Samsung's general technical support number is 800-726-7864. In addition, the company provides separate technical support numbers to contact depending on the nature of the call and the product in question.
Samsung's business technical support line is 866-726-4249. The company also provides a separate technical support line for issues related to mobile phones (888-987-4357) and hard drives (800-732-4283). Hearing-impaired callers can call 888-899-7608.
All technical support lines maintain different hours of operation. The general technical support line operates from 9 a.m. to 9 p.m., Monday through Sunday, while the other lines operate on a less intensive schedule.