fisrt click on the phone (green button) > Blackberry button > General Option > Dial From Home Scree > Select No
This will enable application Launcher
A - Address Book (or Contacts)
B - Browser
C - Compose Text Message
D - Memo Pad
G - Google Talk (if installed on the device)
H - Help
K - Lock
L - Calendar
M - Messages
N - BlackBerry Messenger
O - Options
P - Phone
R - Alarm
S - Search
T - Tasks
U - Calculator
source:http://www.technonnews.blogspot.com/