I know Public Mobile was having issues with dropped calls. They say the issues have been fixed however, when was the last time you restarted your phones? This was the suggestion I just gave someone else. See if this works.
Can you try something for me. I know this will sound weird but you know, everything is all about trial and error sometimes. Can you and any one of your family members go into your network settings, turn off automatic and choose Public Mobile. Then reboot. Test your texting and MMS and see if this solves it. I bring this up because I feel that sometimes when our phones bounce off other service providers whether we have an "agreement" or not, I feel they sometimes go Missing In Action.
