Mag scan po kayo ng network. Mag manual search kayo ng carrier. Disable niyo ung autoselect. If dual sim phone niyo, I recommend using Globe sim instead of Smart. After ng manual search ng carrier, Lalabas sila Globe, Smart (forbidden). Kapag may nag appear na 51566, yan napo si DITO. yan kasi ung PLMN (Public land mobile network) ni DITO.