Unblocking your number on various mobile networks
Call blocking / labeling currently happens at the destination carrier. Carriers watch for how many simultaneous calls they get from a unique phone number, if its a disconnected number, and are beginning to use caller ID reputation registries. Additionally the end user may also be using various smartphone apps that crowdsource reports of nuisance calls.
Even if you don't telemarket, scammers can hijack your number and ruin your business phone numbers reputation.
If your callerid name shows up as "Spam Likely" or "Scam Likely" when calling mobile phones, it may have been mislabelled as spam.
You will need to contact the mobile phone provider and have them remove the label .
You should visit these links:
For Comcast: https://xfinityspamfeedback.com/xfinity/#
For AT&T : https://soc.att.com/2N7WSjf
First Orion, Hiya and Transaction Network Services: https://www.freecallerregistry.com/fcr/#