Wonbin and IU have teamed up to create a 2-part CF series for SK Telecom's '4G LTE' smartphone data service, which will begin airing on July 22nd. Wonbin's CF will be based around the "LTE" data service, while IU's CF will be focusing on "HD" quality videos. 4G LTE, a service that's 5x faster than the standard 3G service, has Wonbin introducing it by saying, "Who would leave a computer and use a smart phone to downlo...", but before he can finish his line, the download completes, leaving Wonbin in a surprised state. IU's CF, which focuses on utilizing the 4G LTE service to stream in HD quality, will have IU experience a moment of insecurity. The idol, who's confident with her flawless skin, all of a sudden loses steam while doing a video call in HD, since the high quality video would be able to pick up all of her imperfections. IU is known for taking part in a lot of video calls, so she cracked up the crew after production wrapped up by saying that from now on, she's going to have to put extra effort in taking care of her skin. Source: Newsen via Nate