Numerous users have written in to note that Clearwire's e-mail systems suffered a glitch last Friday resulting in users getting numerous e-mails stating they hadn't paid their bills. Some users complain that they received e-mails saying they didn't pay -- despite having cancelled their service months earlier. This forum user received eight e-mails for non-payment in 45 minutes for an account closed last year. We've seen at least one instance where a user who was never a Clearwire customer in his life was informed he needed to pay his bill or face losing his non-existent service.

Clearwire says the problem was an unspecified glitch in their e-mail systems and customer accounts have not been impacted. It's not clear how the company generated the list of customers and non-customers alike.

"Current and past CLEAR customers may have received one or more inadvertent emails stating that CLEAR could not process a credit/debit card payment and/or that they needed to make a payment in order to reinstate their CLEAR internet service. Nearly all of these emails were sent in error, and we sincerely apologize for any confusion and inconvenience that this may have caused," says Clearwire.

"Current CLEAR customers in good standing should not be experiencing any interruption in their CLEAR service, and no action is needed on their part. Former customers who received this email can be assured that we have not attempted to charge their credit or debit card. We believe this issue to be resolved," says the company.