MakeUseOf published a review on the Unihertz Titan
A quote from the article:
Our verdict of the Unihertz Titan:The Unihertz Titan is a Blackberry alternative for the smartphone age. However, the physical keyboard comes at a cost, as the device is heavy, large, and uncomfortable to use.610Despite the benefits of touchscreens, some people prefer the physical keyboards of old. In the mid-2000s, Blackberry reigned supreme. The companys phones had a unique design, paving the way for smartphones, but owed a lot to some of the first mobile PDAs.Unihertz Titan Review