@Dixyburger Hi, Based on the screenshot, your MR600 is V1 instead of V2, that is why you are unable to update the firmware for V2. For V1, please download the latest firmware on the following...

@TheUntouchable Hi, thank you very much for the feedback. So you are using O2 SIM card, but the default profile selected automatically is E-Plus instead of O2Internet, right? May I know if internet...

@scottzahara Hi, please check the Internet IP address on Advanced->Status page to see if it is a public IP address or not. Most mobile operators assign private IP address now, if your SIM is getting...

@Sanafarrokhi Hi, do you mean you have tried to change WiFi channel, channel width and also turned off the power saving mode? When the problem happens, WiFi disconnected completely or WiFi is still...

@TheUntouchable Hi, here is the download link: https://www.tp-link.com/en/support/download/m7450/#ISP_File

@Tony3466 Hi, what is the SIM card status on Advanced->Status page? If indeed no SIM cards can be detected any more, please try the following troubleshooting steps: 1. Unplug and reinsert the SIM...