T-Mobile CTO Cole Brodman revealed that T-Mobile will ramp up their 3G speeds to 21 Mbps in 2010. They expect to have its 7.2Mbps HSDPA service online by the end of 2009 and move to HSPA+ in 2010. It remains unclear when T-Mobile will build their 4G network, but HSPA+ should extend the life of their growing 3G network. According to Cole Brodman, T-Mobile is likely to go with LTE technology for 4G.
Sprint has chosen WiMax for their 4G network and claims peek download speeds of 10Mbps. Verizon is going to be building their 4G network in 2011 and has selected LTE technology which offers 50 to 60 Mbps.
You can see an archived copy of Cole Brodman’s talk with Om Malik on GigaOM TV.