Relying on AT&T, Verizon and T-Mob US to protect you from SIM swapping? You better get used to disappointment

Study shows top telcos are naff at fending off cellphone number hijackings

Four Princeton University eggheads have published a report showing that the five major US mobile carriers implement weak authentication techniques, leaving customers vulnerable to SIM-swapping attacks that transfer victims' phone numbers to devices controlled by scammers."