Recently went to Florida and had to make a few domestic calls on my Orange phone.

On checking the charges on my bill I find I have been charged the full rate for a local (same area code) call made on AT&T Wireless, yet not charged for calls, local, semi-local (neighboring area code) and free (1-800) made through T-Mobile.

So, if in the USA, manually select T-Mobile.

Beware. Because of the way the call records are passed between roaming partners, it could just be that they weren't received by Orange from T-Mobile in time for your current bill. It is not uncommon for late-rated calls to appear on roaming bills and these may appear on your next bill.

All the calls appear on the bill charged at £0.00