Boost Mobile Detected Unauthorized Activity on Customer Accounts

California-based Boost Mobile, founded in 2000 as a joint venture with Nextel Communications and now a Sprint subsidiary, has warned an unspecified number of customers about unauthorized online account activity on March 14, 2019.

An undated customer letter posted on the Boost Mobile website provides very little information beyond that "an unauthorized person accessed your account through your Boost phone number and PIN code." The implication is that the unauthorized person either already had the user's phone number and PIN code, or acquired it at the same ..