Security researchers found vulnerabilities at AT&T, T-Mobile, and Sprint that could have exposed customer data

It hasn’t been a good week for telecommunications companies: security researchers have uncovered security flaws with systems at AT&T, Sprint, and T-Mobile that could have left customer data accessible to bad actors.Yesterday, BuzzFeed News reported two flaws that left customer information information vulnerable at AT&T and T-Mobile. In T-Mobile’s case, an “engineering mistake” between Apple’s online storefront and T-Mobile’s account validation API all