If you have an iPhone and don’t have a Sim card, there are a few ways to fix the issue.

  1. Go to your Apple account settings and add a new Sim card. This will fix the issue of not being able to use your iPhone with a Sim card.
  2. If you’re using an older model of iPhone, you can try resetting your phone to factory settings. This will erase all your data and start from scratch. If that doesn’t work, then you can buy a new Sim card or upgrade to an iPhone 6 or 6S model that has support for Sim cards.