Check Sim My Phone Keeps Coming Up Check SIM?

My phone keeps coming up check SIM? - check sim

I just got a new SIM card with 3 I have a Motorola V3, which is not blocked by Optus, but I opened a year ago to switch to Vodafone. Well, I tried to put in a SIM card 3, and do everything you to see "SIM-get help! Kepp in mind, I will be cleansed and purified, but their brand. Work on another phone, but not by me. So it is not to be cleaned.