A morning when I woke up, I check SMS on my mobile phone. There is already an annoying SMS at early of this day. The SMS regarding the provision of free RBT. Actually it's OK, but I was afraid to be a problem later. By: Mochamad Yusuf* This SMS says a RBT (Ring Back Tone) has activated on my mobile phone. I forgot the song and the name of its band. That activation did not reduce my credit. Free alias gratis! The RBT is only for a week, aka 7 days. After that I have to pay Rp 7,000 a month. In SMS it is notified how does to stop. But there must be a song code must be entered. Yes, I do not know the code which free song was given. SMS was not told how to stop RBT easily. For example if I unsubscribe with no song code. Which makes I shook my head, the activation of RBT was after I bought pulse the previous night. Exactly the right strategy because my pulse was still intact. If activated a week after the filling pulse, my pulse may have run out. Hehehe. Of course I am annoyed. Although...