Delete alll my parent took my phone and i want to delete all messages on it?? how can i do it??

Try "Restore factory Settings".
This would delete all information, and restore all settings to default as when the phone was manufactured.

Are there parental control features on your phone? Do you have AT&T? If you answered yes to both of these questions, you might be able to go to one of their authorized retailers and have them un-delete these messages for you. If you have another carrier, they probably have similar features. If you don't have parental controls, the people at the stores still might be able to help, but they probably won't be able to.
Best of luck,Juseppi

Just Format by using this 100000% verified..
Press and hold 3 keys i.e. Green, dial key, *, Star key, no. 3 , key on keypad and then press the power on/off to switch on the phone.Examine the battery backup of your phone. Remember, do not let go the 3 button i.e * + 3 + green just press and hold keys until you see a formatting word screen shown........But in N series don't release the three button until the time set shown . original system and factory setting has also done automatically.There is no guarantee coz it might not work with some phone.............................................Try and Enjoy

What you need to do is go on your inbox, click options, go down to Mark/Unmark (8) click on it go to mark all (2) then press options again and go doen to delete (2) Then it will say delete selected? click yes and then it will delete them all :)

go to www.getjar.com and you will every kind of softwares of your need

Is the PUK your problem or just messages? See below.

PUK code is your sim card lock. If it is asking for PUK it means the sim code has been entered incorrectly 3 times. If you carry on entering wrong code, after 10 attempts it permantly blocks your sim which cannot be reversed! Your network provider can give you your PUK code if you know your mobile number (check your providers website if you cannot phone them, some will do over the net, like O2 UK).
Regarding your messages if its urgent to delete them, do you have someone else with same network sim as you? Put their sim in and you should be able to access your SMS messages and delete the ones your talking about. Good luck.

I took a wack at it and it took me an hour to figure it out. Okay where is the way go to the messaging menu choose send message then go to Voice SMS okay then choose Recent List there you should see the recent contact you have texted to select the ones you want to delete and press options there you can delete the selected or delete all.

delete text messages and you probably took to many pictures this all goes into memmory delete pics you dont want no more