my add on expired yesterday (Monday) but this problem started on Saturday - I have tried re-booting - I have not had this problem before & have used the USA add on quite a few times, took about 4 hours yesterday but was finally able to send a message...
I had a USA add on last weekend, my phone was fine until Saturday, so a week since I was using my USA add on - I do this alot & have not had any problem changing back to Canada - though almost everytime I have to get hold of them because the USA add ...