Thai cellco DTAC yesterday launched a trial 3G mobile service over an 850MHz network in central Bangkok, supplied by Huawei of China and costing THB100 million, reports the Bangkok Post. The first phase of the trial W-CDMA/HSPA network consists of 18 base stations covering Chulalongkorn University, Pantip Plaza, MBK, Siam Square, Sam Yan and Chamchuri Square, with another 18 base stations due to be set up in other areas by December. 2,000 selected customers will be given free 3G mobile broadband access though DTAC datacards for notebook computers, but the company will limit data volume to 5GB per month, the report continued. Maximum connection speeds are expected to reach around 5Mbps. DTAC plans to expand its 3G network further once the country awards 2100MHz licences, which is expected in late 2009 or early 2010, although a precise investment plan awaits the issuing of clear licensing terms and conditions, scheduled to be issued later this month.