T-Mobile is a mobile phone services provider which originally was owned by Deutsche Telekom, and which merged with Orange to create a joint venture known as EE in 2010. Here is where you can find out how to contact its customer services department.
Contact T-Mobile by telephone
The customer support telephone number for T-Mobile using a mobile phone is 150, and calls are free during normal working hours. If you are using an EE landline you can call 0845 412 5000, while if you are using another provider the number you should use is 0207 362 0200.
Alternative ways to contact T-Mobile
Go to the T-Mobile and EE website help page at T-Mobile where you will find a FAQs section and a list of codes you can send text messages to in order to get replies sent to your phone. You also have the option of writing to EE Customer Services, 6 Camberwell Way, Sunderland, Tyne and Wear SR3 3XN.