suggested that you change this code immediately. Q. How to change the RUIM Lock?
A.Settings
Security
Enter Lock code (By Default lock code is 000000)
PIN Management
Change PIN
Enter old PIN (By Default PIN is 1234) 
Enter new PIN 
Repeat new PIN
Ok
Q.How to enable RUIM Card Lock?
A.Settings
Security
Enter Lock code(By Default lock code is 000000)
PIN Management
Enable PIN
Enter PIN (By Default PIN is 1234) 
Ok
Q.How to disable the RUIM Lock?
A.Settings
Security
Enter Lock code (By Default lock code is 000000) 
PIN Management
Disable PIN
Enter PIN (By Default PIN is 1234) 
Ok
Q.How do I increase the volume of the phone ringer?
A.Profiles
select any mode
Edit profile
Ringer volume
select High
Q.How do I change the ringing tone?
A.Profiles 
select any mode
Edit profile
Ring tone
select any music 
Ok
Q.How do I view the last dialled numbers?
A.Press the call key to select the last dialled call.
Q.How do I assign a key to speed dialling?
A.Names
Speed dial
Options
Set entry
Select number from names lists
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