How to Fix SIM Not Supported on iPhone? Struggling with the “SIM Not Supported” error on your iPhone? This issue often appears due to carrier restrictions, network compatibility problems, or activation-related limitations. It can block calls, messages, and mobile data unexpectedly. Knowing why it happens helps you understand your options and get your iPhone connected again without unnecessary confusion. 📱 #iPhoneTips #SIMNotSupported #iPhoneFix #iOSTips #iPhoneHelp #SIMError #iPhoneProblems #Fi