The CDMA market is under long-term pressure in Brazil and is being swapped out for 3GSM in Australia. In Venezuela, Mobilnet has announced plans to overlay GSM on its CDMA network to reach low-end subscribers. In India, Reliance is migrating its CDMA network to GSM in urban areas. Neither Verizon nor Sprint has opted for long-term CDMA migration strategies. Sprint is planning a commercial launch of mobile WiMAX in April, and last November Verizon announced it will implement long-term evolution (LTE), a 3GSM migratory technology.
This, combined with the improvements in GSM technology, has removed many of the advantages that CDMA once had. This graph (from the article) shows CDMA slowing. Since LTE and other technologies don't enter into the technology mix until after 2011, it doesn't show a decline.