Telstra Ultimate WiFi Modem (SW753S) Next G Telstra Ultimate WiFi Modem (SW753S) Next G Telstra Ultimate WiFi Modem (SW753S) Next G. The Ultimate Wi-Fi shares technology with Telstra's other Ultimate product, the Ultimate USB Modem, in that it's a Dual-Carrier HSPA-capable device, which gives it a theoretical maximum of 42Mbps throughput speed. In the real world you're not likely to get that kind of speed, and even Telstra rates it for "between" 1-20Mbps in Dual-Carrier HSPA (DC-HSPA) areas; outside those areas you'll typically see between 550Kbps-8Mbps. As with all things wireless, variability is the name of the game. The Hotspot itself can work as a USB tethered modem, but most folks will take advantage of its ability to pair up to five devices across an 802.11n network instead. Telstra rates the standard 1800mAh battery in the Ultimate Wi-Fi as good for up to four hours of connected use. Dimensions (H x W x D) 57 x 96 x 16.5 mm Weight100g Pricing as at 17/07/11. Recommended Retail Price $349.95 Our Price $299.95