Inbound requests after opening Electrum
As @Anonymous said Electrum servers listen on port 50002 so that's what you are seeing here. Your phone is connecting from a random local port to remote 50002 on the servers. 

Electrum gets blockchain data from electrum servers run by volunteers. These servers see your addresses + transactions but they don't see your private keys or seed. So you lose privacy compared to using a full node like bitcoin core but you still have exclusive control of the secrets that let you spend your bitcoins. The upside of using electrum over a full node is that you don't have to download the 200GB blockchain. You can get up and running straight away.