In this guide check out how to Rectify Apple iPhone Different SIM Issue.\r\nSometimes SIM cards get damaged and are needed to be replaced. If you receive an invalid SIM card message on your iPhone without changing the same, or your iPhone shows message of different SIM card installation, then you should contact your service provider to seek out the problem of your SIM card. Before you go for the detection of the error of your iPhone, you yourself can try to make the error correction.\r\n\r\n\r\n\r\nFor that, you need a SIM card. You don\u2019t need to be afraid of changing the SIM cards because it doesn\u2019t let you lose your important business information, business data, client contacts or some other important details.\r\n\r\nBut you should have a back up of all your data before making any changes to your iPhone to avoid any kind of risk.\r\n\r\nHere you need to follow the process to rectify the issue:\r\nTo take Back up and Update\r\n\r\n \tGet your iPhone connected to the computer and launch iTunes, if it is not getting launched automatically.\r\n \tPress the iPhone button and go to the \u201cSummary\u201d tab.\r\n \tChoose the \u201cBack Up Now\u201d option to make a back up of your iPhone. After the backup is made, plug out your iPhone and see whether the error message is still appearing or not.\r\n \tIn iTunes press the \u201cCheck for Update\u201d option. Choose the \u201cDownload and Update\u201d option is shown.\r\n \tPress \u201cNext\u201d and click \u201cAgree\u201d to make the update process start. Complete rest of the prompts for updating your iPhone to the latest version, if in case applicable.\r\n\r\nMake the Network Settings Reset\r\n\r\n \tGo to the \u201cSettings\u201d app and choose the \u201cGeneral\u201d option.\r\n \tClick on Reset.\r\n \tClick the \u201cReset Network Settings\u201d option and enter the password if asked.\r\n \tClick again on that option to make confirm for the restoring of your settings.\r\n\r\nSteps of Troubleshooting\r\n\r\n \tClick the \u201cSettings\u201d app.\r\n \tSet it on the \u201cAirplane Mode\u201d and turn it off again. \r\n \tOn the Settings screen choose the \u201cGeneral\u201d option, and then \u201cAbout\u201d option for updating the carrier settings, if asked.\r\n\r\nSIM Card Resetting\r\n\r\n \tPower off the cell by the \u201cSleep\u201d option for around 5 to 10 seconds.\r\n \tOn the right side of your iPhone insert the SIM card removing tool into the pinhole. Push it softly.\r\n \tTake out the SIM card from the tray and blow a compressed air into it to clean the dirt if any. Check the SIM card to see the damage. Reinsert it and start your cell if you don\u2019t find any damage.\r\n\r\nSo, that was a simple guide on how to fix\u00a0Apple iPhone Different SIM Issue.