If your phones are unlocked you can easily get local SIM cards. They sell them at the airport. I had Globe.
They will try and push the "tourist" sim card on you but its overpriced by about double. So just buy the SIM and buy the credit and activate on your own. Just be careful to turn off data while you activate the new plan or it'll suck up your credit.
I'm pretty sure I used this one which was $2/week for 2GB.
https://www.howtoquick.net/2018/12/g...xt-to-all.html
Have fun! Worked well in Manila but service was slow elsewhere, you might want to get at least one SIM that's different than the others so you might get service somewhere.
You can search around. There's also a GoSakti app.
All the PH mobile providers have their websites in English so you can figure it out easily.