The HTC U Ultra is a massive handset. It has a 5.7-inch display as well as a secondary display and capacitive navigation buttons. When combined with large bezels and a huge chin, the U Ultra can be an unwieldy device. But that's not all, something with HTC's latest flagship has really gone wrong.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips