Have a problem with start button - Nokia 3110 Cellular Phone

Im telling the solution step by step.It ll work . you dont need to go 4 the firmware v5.05 If ur phone restarted 3 or 4 times and switched off automatically.
Try this Remove the battery and Micro SD card
2] wait about 5 minutes
3] Then switch On the phone WITHOUT the memory card Now ur phone working well without restarting
4] Then you must restore Factory settings frm the Settings Menu [default security code:12345] {i know most of people have done this thing,but remember u have 2 go with the correct order.Unless it will not work.OK}
5] Now apply a theme. The theme's size should be below 100kb
6] Now ur phone working fine without the Micro SD
7] Then wait about 5 minutes and Switch off ur phone
8] Remove the battery and insert the Micro SD
{Don t Format the memory card}
9] Switch On ur Nokia 3110c phone.
10] Now Keep ur free Phone memory space [Not the memory card's free space]between 470kb - 499kb.
Now surely ur 3110c working fine about 5 months. During these time u can1
1] Send/receive any file via bluetooth.
2] Enjoy Music,video, GPRS,Yahoo Go .....etc
3] Also u can Update music library anytime. but remember below
DONTs
1] Don t try to change themes.{u have to stick with a theme}
2] Charge ur phone in ON mode
3] Dont fully discharge the battery
4] Start charging ur phone when there is only a bar on Battery indicator
5] Dont erase calender notes
Make sure about above 5 Donts
Dont worry if ur phone restarted once.{U know the problem is restarting several times and automatically swiched off.}