My brand new nokia 5800 suddnly stucked and it ddnt responded to enything exept removing the batry..it hapend several times nw..and the other thing is its turnin off itself 3 or 4 times a day..please help

1. Make sure your phone is fully charged.


2.
2
Backup your contacts list and personal files to MMC memory card (if possible).
3.
3
Switch on your phone.
4.
4
Press and hold these three keys together:
* Red dial key,
* Sharp key (#)
* One key (1)
5.
5
Press the power on/off to swtich off the S60 phone. Do not let go the three keys until you see the "formatting" screen displayed
6.
6
Wait a few minutes until the format is complete. Your S60 will now be at its original factory settings

Method 2

1.
1
Before you format your phone, make sure you back up all your ringtones, SMS and picture messages and most importantly yout contacts. You can use the Nokia PC Suite to do this.
2.
2
Press Red key, select disconnect.
3.
3
Once you've done this, key in *#7370# *#7780# . It will immediately prompt you to restart your phone.
4.
4
Select 'Yes' and the phone will restart after formatting. It takes about 2 to 3 minutes to complete the process. Also ensure that your phone is well charged before you format.
5.
5
Now restore all your ringtones, messages and contacts and you once again have a fresh OS.