Bellevue-based MinuteWatcher, a service that helps customers track how many minutes they are using, said that since June 19 T-Mobile USA has been blocking the service.
The company’s Web site says, “Denying access prevents MinuteWatcher from informing T-Mobile customers about their latest cell phone use patterns. No contact means no service.”
It also said T-Mobile has changed conditions in its policy and taken technical measures to prevent MinuteWatcher from providing service to T-Mobile subscribers.
A T-Mobile spokesperson said yesterday the company was checking into whether its relationship with MinuteWatcher had changed. He said there are three ways for customers to check their minute balance: They can send a text message, call customer care, or log in via the Internet.
MinuteWatcher contends those three methods are not user friendly. Its service sends an email to the customer once or twice a week that estimates the usage at the end of the billing cycle.