Why does my phone have "invalid SIM" notice? My calls are going straight to voice mail.

[iMore Question]

My phone is improperly working after I came back from vacation. I'm logged in to the right wireless router.

 

[Just_Me_D]

Re: Why does my phone have "invalid SIM" notice? My calls are going straight to voice mail.

I don't know, but you can extract the SIM card and then reinsert it to see if that helps.