SANTA CLARA (WiMAX Day). Beceem Communications announced last week that it has completed initial interoperability testing between its mobile WiMAX chipsets and Sprint Nextel’s WiMAX infrastructure. The testing was perofrmed as part of on-going preparations by Sprint for the launch of mobile WiMAX devices. Beceem said that the successful completion of this testing is a milestone achievement that “shows the commercial readiness of WiMAX equipment and chipsets in preparation for the timely launch of Sprint’s Xohm™ Mobile Broadband Service, which is expected to begin during the 2nd quarter of 2008.” In response to this news, Bin Shen, Sprint vice president for Broadband, said “We are extremely pleased to see that Beceem has validated initial interoperability of most of key features for Xohm’s 2008 launch.”