I always received an error "Not enough memory..." when im trying to send a SMS; IT ALWAYS FAILS!!!. This is the third time i experience this problem. The first and second time, i sent my phone to Nokia Care Center, they formatted it and reinstall the software (i have v4.13 already). Now in this third time, what is really the problem of this phone? When I asked them they told me it was the problem with the operating system. Does it mean Symbian OS is unreliable??? Pity!!! Please i need your suggestion if i can fix this without sending to Nokia Care Center...