To set up the situation, my friend in china has an iPad and an iPhone, while I have the same devices. When I message him from my phone, it goes to one thread on his phone from my phone number. When I send him a message from my iPad it goes to another thread from my email address. Messages to my phone number only go to my iPad, and same to his. Is there a way to make these conversations flow between all devices and only show up in one thread short of only using the email address? I like the send as SMS feature. I understand not getting phone number messages on the iPad (although being able to enter a forwarding email address would be nice), but is it possible for messages from both email and phone numbers from the same contact show up in one thread?