Product worked really well on my phone, but I would not consider this "universal". I mainly bought it for my computer, which is a Lenovo ThinkPad. It's not very reliable as it sometimes works, and other times just shows up as dots instead of what I was writing/drawing. It's very frustrating to work with, and I will be returning it. This is the second time I've purchased a "universal" pen from Walmart, and both have not worked as they're supposed to. I will not be buying any future electronics from this company. The picture I've added to this review is of me trying to draw a straight diagonal line, the top one is the pen, and the bottom is me using my finger instead.