source: suehan's blog
suehan: I believe the blogger works for LG cellular phone and he explains how LG cellphones work in the dramas as PPL (Product Placement) in his posting. I only tranlsated the part related to BYJ.
"I hope the cellularphone from LG Electornics does well next year too. I just want to give you a tip. Last week, the best premium class smart phone of LG Electronics was delivered to Bae Yong Joon. When you watch a drama from now on, it’ll be interesting for you to see which products are in actors’ hands."