Automated mobile testing strategy for the usecases that involves multiple phones - say bluetooth data transfer, etc

Question

What could be the best automation test strategy for mobile uses cases that involve multiple devices:

• Bluetooth data transfer
• Push data from one phone and pull the same from other phone
• Hit like or share button on one phone and see the count updated on the other phone
• Send SMS from one phone and check if the SMS is received on other phone

The usecase can involve multiple platforms too (iOS to iOS / android to android / iOS to android / android to iOS)

Answer 1

I created two Appium instances, each associated with one device and executed the test case. It was successful and did solve my problem. However, I am not sure if this is the best approach.