It seems that there will be no UMB (Ultra Mobile Broadband or 4G CDMA) now that the creator of CDMA, Qualcomm, has ended its development of it.. I posted the link to where I found the news below...
http://www.phonenews.com/qualcomm-ab...ma-ended-5488/
To summarize..
Qualcomm created CDMA technology, and it also is dominant in GSM. The 4G GSM is called LTE (Long Term Evolution). No CDMA company has embraced UMB, and they are instead flocking to Wi-Max.. So Qualcomm has killed UMB, and will only help develop LTE...