Sim error?

[sheri3466]

I have an iPhone 15 pro max, unlocked. I’ve recently started getting message saying ‘sim error’. Have to restart my phone. What should I do? 

[MSF]

@sheri3466  Have you tried taking the sim out, cleaning gently and then re-inserting?

If that doesn't work, you can order a replacement sim: https://help.smarty.co.uk/en/articles/1215834-what-to-do-if-your-sim-card-gets-lost-or-stolen