You could be right. There is a lot of chatter on the net about this problem. I will wait a few days and then open a support ticket with AT&T.
Cheers
Dave
My microcell is probably 3 plus years old too. My Note 3 connected with it and worked fine for 9 days. Then yesterday it stopped working. Will not work with the wife's iPhone 5 now either. My sim is the orange one.
Facebook
Twitter
Instagram