See if theres a setting called Ascending Ringtone or something.
have you tried changing the tone :thumbup:

 

It could be something on the device causing it or the phone itself you can reset it if it still does it it's a bad phone!

 

It could even be a problem with the carrier or sim. Does the phone show any signs of recieving a call when you hear the first ring at your end? i.e, is it just the actual ringtone that doesnt kick in until 3rings or is the phone not lighting up, reacting at all untill 3rings?

 

You could change the slot cycle index. That sets the interval the phone polls the tower to see if any info (phone call, text) is available. It varies from phone to phone and most involve entering a service menu via a #*# code. Sorry, I don't know the specific code for the Revolution. A Google search revels some possibilities.

Remember: Setting the slot cycle index to a more frequent polling time will decrease your battery life. Also, be careful when using service menus. Changing the wrong setting could brick your phone.

 

Moved to the Revolution forums, the guys here will be in the best position to assist!