The design of the device is impressive. Even the picture and sound are exemplary. Unfortunately, the unit but defects that caused me to abstain after three attempts with each exchanged devices from this unit. The reasons: In all three instances the LTE connection worked each not with Vodafone SIM card. At best, the PIN will be requested. After a minute, trying to connect a pointing device to your wireless service provider, who does not know this and has come here more like Pontius into the Creed. However, the Vodafone technique was so nice to look with me online for the cause. It is accordingly an internal modem, which - for any reason whatsoever - in any case can not do anything with Vodafone SIM card. The defect also appears in the Device Manager. The hotline of Lenovo was not so good. She was not particularly friendly. One of them tried consistently, I certify an incorrect handling of the device. On the web and in the Amazon customer forum, the problem is in the meantime known, and some customers have reported that have the same problem with the SIM card. Well, I was still determined to keep the (third) device and wait for software improvement by Lenovo. But there was another problem:. Device No. 2 "choked" at the Windows updates and no longer went high. It no longer went to. After ten minutes, although the start button again responded, and it began an endless loop with self-repair attempts that began over again, etc. The broke then attempt made by a factory reset began promising first. However, after five minutes, the message "reset failed" (or something similar). Device no. 3: SIM problems as before. The updates have been installed without problems though. But then, in another start like device no. 2 car repair function with infinite loop. Although this time closed the factory reset. At this point I had enough, however, and returned again this device. Now standing around with me a "People's Tablet" with G3, that works without hesitation, even with the SIM card from Vodafone. That this device costs only about half as compared to the Yoga Tablet, naturally comes at a price. Less good picture and sound less good. Maybe it will be Lenovo still, really rectify at the Yoga Tablet. But then, a separate power supply connection should be created. The plugging of peripherals and power supply over a combi-micro-USB port is a bit annoying. One coming from the USA Soft, promises the parallel use of power supply and peripheral devices, works the way not on the Yoga Tablet. By the way: The two stars are for the good design and good picture and good sound.