Welcome! Long ago, when I decided to go with Visible, I contacted Visible via chat because I had received my SIM, but wanted to wait for the next Saturday to activate so that I would have the weekend to deal with any issues. I was told at that time that I had 30 days to activate. I activated less than a week after receiving the SIM, and with no issues. You could contact Visible to see if 30 days is still the limit...
