Lol what do you mean "blocked". 

 The port is blocked: https://x.com/SimpleXChat/status/1835072004921475219
That's the Mastodon bridge since it wasn't posted on Nostr, and your reply doesn't appear to have gone through on it. 

 You can run SMP on any port, including 443.

I'm a genius I know bow to me now. 

 sad  

 Simplex can be shutdown by governments
Nostr can't be shutdown by governments 
https://image.nostr.build/a977ce4ddd384ffc7215366562a467130f9a808ed904029c3fc92110d9455bdb.jpg
nostr:nevent1qqsyc2e9pyhdjm6y3ykpkgcpp4wg4gv56lcv5gn9mttmz9g6etl5xdqpzamhxue69uhhyetvv9ujumn0wd68ytnzv9hxgtczyza02rf4umjrp3uwedu4e0cnecf9jrfhtj6yjpxxmkwkh47477afkqcyqqqqqqgu555rp 

 Just use old and solid xmpp. 

 Not sure what you claim is being blocked...

Tested with a VPN set to Russia, SimpleX messages working fine

Voice calls takes longer than normal to connect. 

Can you clarify what is being blocked ?