List of approved modules and devices is avaialble at https://marketplace.m2m.telekom.com/
T-Mobile is based in Austria and provides M2M services on LTE,DC-HSPA,HSPA+,HSDPA,GPRS,GSM,LTE NB-IoT technologies.T-Mobile M2M developer support information is also available at the website.M2M service platform is available through M2M E2E Solutions. M2M vertical markets focus for this carrier are Asset Management ,Telematics ,Telehealth ,Digital Signage ,Fleet Tracking ,Remote Worker ,Remote Monitoring. M2M data plans are available in T-Mobile
Duetsche Telekom which owns the T-Mobile brand provides M2M services for the various regions where T-Mobile services are available. They provide pre-approved M2M modules and devices, software, developer support etc. T-Mobile M2M also provided end-to-end services, consulting, connectivity and support.
 - Subscriber number as of 2012.Please check the carrier website for up-to-date information