Finally I managed to change my phone. My old Nokia 3310 [kindly presented to me by my brother as a birthday gift a three years ago] served me a lot and finally the battery dead. Due to the reason that I needed more powerful mobile I went and got Sony Ericsson p910 which I found to be a very good phone with everything (and even more) stuff I that were in my requirements list.
in addition I got a USB bluetooth (very small and handy) so I can make file exchange between my phone and all the computers I need.
Hope that the new phone will server me as good as the old one.
P.S.: since I have a digital camera in the phone I hope that some photos might appear in this blog from time to time which will make it more lovely.