Can I have hyphen's in my phone numbers?

[garywi]

I just tried another phone at T-mobile running ICS. All phone numbers in contact list AND when you dial are like this: 1-587-657-1234

All the numbers in my Sensation are like this: 15876571234

When I dial, I want to see this in my dialer and contact list: 1-587-657-1234

Can I change it some how?

Thanks