Lenovo supplied Windows Central with a review unit of the Yoga C640, with 10th Gen Intel "Comet Lake" Core i3-10110U CPU with two cores and a turbo frequency up to 4.1GHz. Moving to the left side of the laptop, you have a barrel plug for charging, another USB 3.1 Type-A port, and a combo jack. We are presenting to you our Top 5 picks about the Lenovo Yoga C640 (13). You can check our in-depth review here. The Lenovo Yoga C640 (13) is a great option for those who want a Yoga device but the C940 is too expensive for them (and it is). It's the entry level for the company's Yoga series of convertibles, starting at $599. Lenovo Yoga C640 initial review: All about 4G connectivity Source: Pocket Lint The Lenovo Yoga C640 is all about 4G LTE connectivity. The Lenovo Yoga C640 is a 2-in-1 convertible laptop with tepid performance, but also a reasonable price, above-average build quality, and an exceptionally long-lasting battery. Our review unit supports 4G LTE, but according to Lenovo, it’s still unclear if they would bring an LTE variant of the Yoga C640. Lenovo's Yoga C640 has an Intel processor this time around, unlike the Snapdragon-powered Yoga C630. It can be transformed into a tablet with one move and it is equipped with some great hardware inside.