unblocking my phone number

[ruffems]

ok, here is what I've had happen over the past couple of months

I've made some phone calls to people and I get this message on their end that they do not speak to people who block their phone numbers.

I've been also told that sometimes when I'm calling a person that person will tell me that my phone number came up in their caller ID as a blocked number.

Where on my Touch pro 2 do I go to make sure that my phone number doesn't show up to people I call as a blocked number.

I hope this was clear as I can't think of any other way to explain it.

Any help would be appreciated.

Thanks