SIP inbound calling not working

Hello everyone,
I’m new to the VOIP and FreePBX, I have successfully installed FreePBX-5.211.65 and setup SIP trunks to make outbound calls on regular mobile phones, but I am having problems setting up inbound routes to be able to recieve calls to the sim cards used in my trunks, I have set up inbound routes, ring groups, queues and extensions, but the calls would not come in, i used all the information my sim provider gave me, but still no result and I have been trying to fix this for 3 days now and still no result, I’ve used the forums here which gave me a lot of help during the initial set up and outgoing calls but for incoming calls I found nothing that helped.
Can anyone help with this problem by giving links maybe to a proper set up for Russia, because all I could find was either for USA CANADA and UK.
thank you for your time.