Verizons online billing service went down on Friday. It was unclear how long it was down, but some users said it was out of service for two days.

Users were met with this message when trying to log onto the service:
"Thank you for signing in to My Verizon. Some account actions are temporarily unavailable while we upgrade our systems. We apologize for this inconvenience and look forward to serving you more fully the next time you sign in."

A Verizon spokesman said in a statement: "We are unfortunately experiencing issues with our billing system, affecting customer accounts mostly in Northeast, Midwestern, and some southern states. We are working on a fix."

"This is an internal billing systems issue not affecting network services," the company said. "Verizon Wireless apologizes for any inconvenience."