It’s finally here: HTC has just unveiled its latest workhorse phone, the One S. This model slides in just below the One X, using a smaller 4.3-inch screen with a 960×540 resolution, the same as most of HTC’s phones for the last year. Instead of the screaming Tegra 3 on the X, the HTC One S gets a standard Qualcomm 1.5ghz dual-core processor. On the software side, it gets the same treatment: Ice Cream Sandwich with HTC’s updated Sense UI 4 as a topping. The phone is getting its worldwide unveiling at Mobile World Congress.