The wireless carrier is working to restore services, which

are expected to operate at near-normal levels in affected

areas, including  major cities like Chicago, Los Angeles, Las

Vegas, Phoenix, New York and Seattle. T-Mobile didn't 

disclose how many users were affected by the issue, but

data from Down Detector, an outage tracking tool that relies

on user-submitted data to create service reports, shows

customers have filed more than 83,000 complaints break.

Monday at 10:00 p.m. Eastern Time.  By midnight the

number had dropped to around 9,000. Down Detector's 

comments came from users saying that they are located in

Arizona, California, Colorado, Florida, Hawaii, Kansas,

Nebraska, North Carolina, Klahoma, Texas and Washington.

Users tweeted about the outage, saying their phones

appeared to be in "SOS mode" during the outages, meaning