My Sprint Phone works here - on Digital Roam
I don't use it, but I can still check to see if I have voice mails. I haven't seen any Sprint stores or services here - but I haven't really investigated it.
My personal opinion is Sprint is the worst of the bunch in mobile phone plans.
I called Sprint to ask them about rates from the DR when I was visiting in the past. I was told that the phone would not work there (here). I kindly pointed out that I was calling from Santo Domingo. I was told that it was impossible and that my phone "wouldn't work there".
I stated again "lady, I'm calling you from the Dominican Republic". To no avail, she wouldn't believe me.
Yeesh.