For general customer care and technical support, customers dial 611 from their T-Mobile device or 877-453-1304 as of 2015. T-Mobile offers automated help 24 hours a day and seven days per week. Live customer care associates offer help from 3 a.m. to 10 p.m. PST daily.
T-Mobile advises customers who have problems with their T-Mobile devices to dial the 877 number from a different phone. For hearing-impaired customers, T-Mobile offers a TTY line at 877-296-1018 that operates between 5 a.m. and 10 p.m. PST daily. Customers who need quick information can dial short codes such as #225# for balance information, #646# for minute usage and #674# for text message usage.