China Unicom (Hong Kong) Limited (CHU) fell to the lowest level in almost a year as the nation’s second-largest wireless carrier reported the smallest increase in new third-generation network subscribers in four months.

Shares of China Unicom traded in the U.S. declined 3.5 percent to $17.05 at the close in New York, the lowest price since March 31, 2011. Volume totaled 1.96 million, or more than double the average three-month trading activity for the shares.

China Unicom added 2.83 million subscribers to its 3G network in February, the smallest gain since October, to bring the total to 45.89 million by the end of the month, the company said in a statement today to the Hong Kong Stock Exchange. China Unicom had added more than 3 million users in each of the previous three months.