T-Mobile is the fourth-biggest wireless phone provider in the United States and in the United Kingdom. Recently, however, the company is suffering a string of public relations fiascoes. In the United States, there was the situation in which Sidekick phone users found that their information went missing — it didn’t matter to a lot of people that the hardware on which the data was stored wasn’t owned by T-Mobile, it just mattered that their Sidekicks were T-Mobile phones.

Then the wireless carrier’s network went out. Earlier this month, as Ina Fried wrote, lots of people (myself included) found themselves unable to make calls on their T-Mobile phones on November 3 because of a network outage.

Now from the United Kingdom comes news that a T-Mobile employee allegedly sold personal information on thousands of customers to third parties, according to the BBC and the Guardian. Richard Wray of the Guardian said the data breach was the biggest of its kind to date…