T-Mobile
PW10B1

The PW10B1 was a T-Mobile-branded variant of the O2 XDA. T-Mobile described it as a "Full-Color Wireless Internet Experience on Voice-enabled PDA". It was available exclusively to T-Mobile and VoiceStream customers. At the time, the T-Mobile brand had debuted with the launch of service in California and Nevada in July 2002. Over the next few months, the VoiceStream Wireless name was changed to T-Mobile. The device was a Microsoft Pocket PC-enabled PDA with an integrated dual-mode mobile phone. T-Mobile stated that customers could "stay in touch and online with pocket versions of their favourite Microsoft software applications including Internet Explorer, Outlook, MSN Messenger, Windows Media Player, Word and Excel." At the time, corporate vice president of the mobility group at Microsoft, Juha Christensen stated that T-Mobile shared Microsoft's belief "that software is important to provide more value to mobile professionals and consumers so T-Mobile customers using Pocket PC Phone Edition can access more content, and communicate with more people, in more places than ever before.” At launch, it cost  US$550.