Hello, i need help with my RUT240, i have no internet connection when i insert sim cards from one specific provider here in Serbia (telenor), I tried that same sim card in different devices and it works perfectly even when i share connection with hotspot. I also tried simcard from different provider (vip) in the RUT240 to make sure that i didn't receive a defective unit and it works well, so i guess that i need to manually setup APN and probably other stuff in order to make it work? thanks