walkman w810i, bad experience

i ever use w810i about 2 years, but now not anymore. i have a bad ecperience with this mobile phone. first i use w810i i feel comfort because i like to play music in mobile phone and this mobile phone offer a good feature to play mutlimedia file. but after about a year i use this phone , i'm getting know the weakness of the phone. first the phone sometime error and it must be restart. but after that my mobile phone can't be turn on. every time i try turn it on, its only appear white light and flashing. then i trie to repaired it, people who repair it told me that the problem is on the software / operating system so it must be re install. done,,,after the system is re install, its normal again, but its only can be use for about three month. after 3 month the same trouble happend again, my phone dead. because i have no budget to buy new mobile phone so i decide to repair it again, but after i have enough money, i sold my w810i and i buy new mobile phone.