Impossible yan since selected sims lang siya. Pero meron ata bug ngayon na if you want to risk 50 na load magregister ka sa ML50 (Yung 500MB/day) using *123# and it will magically turn into Unli ML 50 daw.
Not sure if still working kaso 50 pesos lang naman siya eh di naman masakit but it's up to you.