Creating special 3.5mm cable to connect 2 androids
Budget: $30 – $250 USD
we need to create a cable 3.5mm that will accomplish this scenario , A. person #1 with Android #1 will call person #2 on GSM network B. person #1 with Android #2 will call person #3 on GSM network C.Android #1 and Android #2 will be connected using your Method D. Person # 2 now can talk to Person #3 ........ i have seen a post that explaining how to do it https://josepheoff.github.io/posts/androidtranscribe4 how ever we need a pro to test it