T-Mobile Offers iPhone Tests and Unlimited Music Streaming T-Mobile US, the fourth-largest American phone carrier, has spent the past year and a half introducing aggressive new offerings to lure customers. Late Wednesday, the company said it would add to those June 19, 2014 Channel/Game Online/industrial Power/IT Magazine/LCD TV/LED TV/Magazine Advertisement india/Mobile Launch/Motherboard/Networking/News/Phone Reviews/Security/Social Media/Tablet/Technology News/Telecom News/TV