Going by a note posted to the Full Disclosure security mailing list on Saturday, hackers are claiming to have gained access to T-Mobile USA databases - which contain customer account data, sensitive corporate information, as well as financial records - and they have offered to sell them to the highest bidder!

In their email, written from pwnmobbile@safemail.net, hackers said: "We have everything, their (T-Mobile's) databases, confidential documents, scripts and programs from their servers, financial documents up to 2009." To validate the claim, the note includes a data dump of information, which likely pertains to corporate operations.

The note further says that the hackers had already made a few unsuccessful attempts to sell the information via e-mails to T-Mobile rivals - they said that the key reasons why their e-mails never got a response probably were presence of spam filters or the 'sensational nature' of the e-mail message.

However, one main reason which makes the legitimacy of the note doubtful is the fact that the aforementioned e-mail address, used by hackers, is presently not an active account - it possibly was either never active or has been shut down at the request of law enforcement authorities.

Meanwhile, T-Mobile says that it is looking into the matter, and that the protection of the information of its customers, as well as the safety and security of its systems, "is absolutely paramount."