If the issue is occurring when dialing out, for example, calling a 3rd party's cell phone, and their caller ID says "spam" or "potential spam", the issue is related to 3rd party carrier having flagged your phone number in their databases. A request to remove such must be opened with the respective carrier.
By completing these forms, you're requesting that the 3rd party carrier does not mark your phone number as "spam risk" or through whatever other means they notify their subscribers.
AT&T - https://hiyahelp.zendesk.com/hc/en-us/requests/new?ticket_form_id=824667
Verizon - https://voicespamfeedback.com/vsf/
T-Mobile - https://calltransparency.com/
Call Guardian - https://reportarobocall.com/trf/
Allow a week or so for these changes to take effect. If you're seeing consistent flagging of the phone number after completing such, you'll want to determine which carrier the dialed party is using. (i.e. AT&T, Verizon, T-Mobile, etc.) A follow up inquiry would then need to occur with that carrier (through the above forms) to determine why the phone number is still being flagged incorrectly.
If the above is not the nature of the problem you're experiencing, please confirm further details and call examples of where this issue is seen. Report such to our team for further review.