Some carriers allow you to dial these codes to see if name forwarding is enabled and which quantity your telephone is presently forwarding calls to — both while you’re busy (*#67#) or for all calls (*#21#). You possibly can change it to ahead calls to a different quantity, resembling your own home, workplace, or a third-party answering service, in settings.
On iPhone, to vary the forwarding quantity, go to Settings > Telephone > Name Forwarding. On Android, the steps differ, however usually you will open the Telephone app, faucet the three-dot menu, go to Settings > Calling accounts, choose your lively SIM, after which search for the decision forwarding possibility.
In case you see “Failed/Error” as an alternative of “Enabled/Disabled” displayed after getting into these codes — and you do not see name forwarding in your settings — it seemingly means your service does not help the characteristic in your plan.