Coming to an end

My first hand phone, bought with my own money, the discontinued W800, have finally force me to make up my choice to get a new hand phone. This is because it keep on turning off itself although the battery is not empty. This problem has come to me since i get it from my sister, but that time, the problem wasn't so annoying because sometime it will turn off after a few day or longer, but now it keep on turning off itself very frequently. The shortest time is few second then it turn off again. Damn, i was enough with keep on opening the hand phone. Yesterday my mum phone me, then i told her about it, and i say i want to get a new hand phone. Was told her this turning off problem last time, but i still can bare with it so i told mum i don't need a new hand phone that time. Might get a new hand phone when i back hometown this coming October semester break. So, if you called me and goes into voice mail or you message me and i didn't reply, sorry, this is not what i can control. I will call/message you back as soon as my hand phone was in "good mood".