Sounds good
Just some words of advice:
When you speak with a rep, come from a place of certainty.
In other words, don't say things like:
1) Do you handle warranty issues?
2) My vibrate motor is broken, is that covered under warranty?
3) Do I have to send my device back to HTC?
4) Are you able to do this for me?
etc., etc.
You get the idea.
Say something like>>
The vibrate motor stopped working on my device and I would like to do an in house warranty exchange.
And go from there.
If they say "it has to go back to HTC," you can say that you spoke with HTC and they said that Sprint should be able to do an in house warranty exchange for you.
Words to that effect.
Just come from a place of knowledge and be courteous.
I don't think you should have any problems.
Let us know how it goes
Btw, all of the above are true regarding what HTC has said to me regarding my issue which was screen separation and how Sprint handled my issue in house.
I am also friendly with the Manager which doesn't hurt
from being in the store a few times regarding warranty exchange issues.
I always take care $$ of the guy for helping me out which assures me of being taken care of the next time.
The $$ is refused but I always persist as I appreciate the consideration.
I am on my third Diamond.
First time was for stylus magnet failure and second warranty issue was for screen separation failure. I have TEP but have not used it yet due to the failures being manufacturing defects.
Vibrate motor failure is also a warranty issue and all of the above should apply.