HTC
TyTN

The HTC TyTN (also known as the HTC P4300) was a Pocket PC-powered smartphone for business professionals and tech enthusiasts. It was a key product for HTC, defining the Taiwanese manufacturer's successful transition from an Original Design Manufacturer (ODM) building phones for others into a consumer-facing brand in its own right. It ran Microsoft's Windows Mobile 5.0 operating system, and its signature feature was a side-sliding full QWERTY keyboard. Combined with a 2.8-inch resistive touchscreen you could use with an integrated stylus and a dedicated side scroll wheel, it offered a great experience for heavy email and document users. It was also notable for its connectivity, as one of the first devices to support 3G HSDPA network technology, along with Wi-Fi and Bluetooth. Because HTC was still building its standalone brand presence at the time, network operators heavily licensed and sold the TyTN under various names worldwide. Hardware variants included the T-Mobile MDA Vario II, Vodafone v1605, AT&T 8525, Orange SPV M3100, or the O2 Xda Trion. It was a bulky 22-millimetre device, mainly because of its sliding mechanism and internal components, but users were willing to overlook it. The TyTN phone became a major commercial success and helped solidify HTC's reputation as a leader in Windows Mobile hardware.