Originally Posted by peteyspambucket
Actually, I do have Verizon. I'm considering unlocking it.
If I unlock it, and put a Tmo sim chip in, would I receive calls from both my Verizon and T-Mo numbers? I wouldn't think that was likely. But I am wondering how the phone would "know" which number to use if I did not change the setting in "Mobile Network Options", since you suggested it did not have to be changed.
No, you will not receive calls on both numbers.
If you set the device to GSM only, you will use your T-Mobile service. If you leave it on CDMA or World, it will use Verizon.