Ahh cge po.. susubukan ko poif old modem version. you can use online zte unlock code calculators. it support 8 algo and 12 algo. yan po ay available sa web. you can also use dc unlocker and other similar services basta supported yung modem mo. however kapag bago yung modem mo, mahirap kasi wala pang free calculator. these modems need 16 digit unlock code kasi. you can have the code pero bibilhin mo pa.