Hi

why my smart device only works with same modem?

My web cam model is Tapo C210

I set the time with Iran 3.30Hours 

I turned off my mobile network and closed VPN . 

but still it says that  " this device can only be controlled locally ?

I checked this problem with my local ISP Customer Support and they said that there is no problem with ISP and internet , only i should set the clock of the Tapo application to Tehran - Iran time , i did all , but still works only with local network. 

my mobile is Xiaomi - Poco F3 , Android 14.

Please help . 

thanks.