The mobile phone looks sophisticated and seductive now. But to many considerations before buying. Do not be easily tempted. Because there are side effects caused. And that's not notified in advertising. By: Mochamad Yusuf * Within the last 6 months I've bought 3 phones. I rarely do this. Because my phone was usually long time to use. I'll buy a new phone, if its phone has many years I used. Like the Nokia N-Gage QD is already 4 years old. And still I have used until now. I bought a new phone, because I wanted to know the various operating systems (OS) phones. Yes, I have been using the Nokia, which mostly uses Symbian OS. This I used as my reference book. The first one, I bought a Motorola Q8. The phone uses Windows Mobile 6.0 OS. Yes, this homemade OS Microsoft. So just as easily use the OS on the computer. Then later I bought ZTE C261. This is typical of the local phone / China. And last I bought a Nokia 5230. This touch-screen phone. It makes using a different OS with ot...