If your number is showing as spam when dialing out to other carriers, it is due to them using an internal database for Caller ID information. Often times these databases are out of date and inaccurately display an authentic number as spam to the receiving party. To fix this, you must complete the process laid out by the following providers:
Verizon/TNZ - click here
AT&T/Call Protect/HIYA - click here
T-Mobile/First Orion/Privacy Star - click here.