Incoming call rings 2 times then goes to V-Mail

[FrankS]

On incoming calls my phone will ring 2 times then go to voice mail. How do I change this to 5 or more rings then go voice mail?

 

[Abe21599]

found this for tmobile, but its worth a shot

How to Change the Number of Rings Before Voice Mail Picks Up | eHow.co.uk