Gmail na hindi pa nagka youtube premium.
Tapos open mo youtube then hanapin mo yung youtube premium tapos try for free. Then enable globe/smart billing then accept mo lang may free 1 montg youtube premium ka na.
Kung gusto mo mas detailed na tut hanapin mo nalang dito may nag post with ss pa.
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Either make sure na walang laman yung payment method mo.
Or abatan mo bago matapos yung free trial then cancel.
Kung sim card ang ginamit mong payment method mapa smart or globe telecom billing pa yan basta walang laman yung sim na nilagay mo pambayad then autocancel na yan after free trial.