Recently I've been having issues sending or receiving MMS. When I try to send one, it will just hang until the exclamation mark pops up and fail to go through. When my friends send me an MMS, I don't receive it. I tried resetting network settings and restarting my phone but that didn't help.
What I discovered is that when I take out my sim card, wipe it down (not sure if this step is what is helping specifically), and pop it back in, I can send MMS again and all the MMS and voicemails that I was supposed to get in the past few days all magically pop up. After this, MMS will work for a while until I realize that it stopped working again.
Is my sim card messed up and needs to be replaced or is it the phone itself having issues?