Today the WiMAX Forum announced that it has begun the certification processes for 2.3GHz mobile WiMAX in the 5/10MHz and 8.75MHz channels. Mobile WiMAX is being certified in three separate bands around the world, including 2.3GHz, 2.5GHz and 3.5GHz. The 2.3GHz bands will be used mostly in Indian, African, and Asia markets, but once certified, it will allow mobile WiMAX chip makers to create tri-band WiMAX chips that can roam onto WiMAX networks all over the world, including in the U.S., where Sprint Nextel and Clearwire are building a mobile WiMAX network.