@AkisN Here's how to update your device FW. 3G/4G dongle could be used to setup the internet connection through the 3G/4G mobile network - user guide - Chapter 13.1 and Chapter 13.1.1.

@ShiranM19 Watch this video to see how to setup your wireless router.

@Fedaye Here's how to change your device administrator password. Here's a guide If you want to change the device wi-fi password.

@Daniel1273 Try connecting to the router by ethernet cable and a laptop/PC (to one of tits yellow ports) - details here. Open your browser and navigate to tplinkwifi.net. You should see the router...

@FirstOne In general you can't upgrade the device with a FW for another region. C5 v4 is with a customized FW for ISPs. Have you tried already to upgrade with the RU region FW posted ? You can give...

@Bob49685 If the EAP is connected to the ISP network directly then the ISP would be able to see its MAC address and eventually pinpoint its location. But since the EAPs are used connected to a router...