Singaporean mobile operator StarHub today announced that, together with technology partner Huawei, it has begun the upgrade of its mobile broadband network to HSPA Plus (HSPA+) technology, following a successful live demonstration of its capability to deliver 21Mbps on the downlink. The download connection is 1.5 times higher than its current capacity of 14.4Mbps. StarHub added that the latest development is in addition to its increased uplink network capacity to 5.76Mbps nationwide. The cellco says that its mobile broadband network will be fully upgraded to HSPA+ ready for commercial rollout nationwide by Q2 2009.