I think this is what caused the problems with the MVNO (Mobile Virtual Network Operator) I use. I noticed today that calling and texting weren't working on our

I think this is what caused the problems with the MVNO (Mobile Virtual Network Operator) I use. I noticed today that calling and texting weren't working on our phones. Our MVNO uses T-Mobile as its network, so this kind of explains everything. Luckily I use Google Voice as my primary # and it rang on my computer but I didn't understand why it wasn't ringing on my cell phone. Now I know :)