Phone dose have enough space and its not turning on

change memory card and tray

it is a company format....no one can delete.....

THATS A VIRUS PROBLEM ON YOUR PHONE UNLESS YOU FLASH YOUR PHONE . WHICH MEANS FORMAT ALL MEMORY SPACE ON THE PHONE.

You can go to setting and give RESTORE FACTORY SETTINGS . Phone memory will be formatted.

if you format your memory throug only mobile. then i suggest you that format your option first in mobile then throug your computer with help of memory card with select this "Quick Format".

I had this same problem about a few weeks ago. I formatted my phone using green key + 3 + * and now the problem is solved.
You have to turn your phone off and then press the green key(used for receiving calls),3 and * at the same time and then turn on your phone whilst still pressing the 3 keys. keep pressing them untill you get a option asking you to select your location.

probably ther isn't enough space left in ur phone memory try deleting to clear up unwanted stuff.
If there is space both in ur phone as well as memory card then rearrange all items in the memory card to specified folders. like if there are items that show outside the folders then dump them into the folders and this will solve ur problem.
This is strange but try it all will be ok. Next time when u want to format ur memory card see that u do it with the phone itself and not through a PC

i think there is a virus in ur phone or memory card plz format ur phn and memory card.........
i m also a n 72 user and i also suffered from these problems but u lost ur all data in ur phn like messages and contacts. when i format my phote the same problem is solved. remember no full format just simple format for phn

Format the player from the Sansa itself - directions are in the manual - and reload songs onto the player.

Check the amount of free space on your phone.. If it does have free space and still its acting up then it may be due to either of these problems..
1)Memory card and Phone memory corrupted.
Solution: Format both Phone and Card memory. If doesn't work try getting another memory card.
2)Firmware issue: The phone's firmware is partly corrupted. You can go for a firmware upgrade.
Hope this helps!