Polycythemia can result from internal problems with the production of red blood cells. This is termed primary polycythemia. If polycythemia is caused due to another underlying medical problem, it is referred to as secondary polycythemia.
PMS can last 1-2 weeks. Premenstrual syndrome (PMS) is characterized by a number of symptoms related to a womanâs menstrual cycle. They occur a week or two before monthly menstruation begins, and ordinarily, they disappear at that time.
T-Mobile keeps the same data for five years, Sprint keeps it for 18 months, and Verizon retains it for one year. Verizon is the only one of the top four carriers that retains text message content, however, and it keeps that for three to five days. Call detail records, meanwhile, are retained for one year by Verizon, five years for T-Mobile (two years for pre-paid), five to seven years for AT&T, and 18 to 24 months for Sprint.