I don't change it so often and to be clearer - last time i did it was like 5..or 6 years ago and it was because it got broken.The current phone that i have has become more than just a "phone" , it's been with me for 5 years , it has more than 4000 messages, almost 1000 photos and 300 videos, so you can imagine..it's a living source of memories for me.It's strange and sad how sometimes an inanimate object such as my phone can be a "more friend" than some actual friends , eh.