iphone 6s imessaging is not working
I bought an iPhone 6s Plus and iMessaging is not working.
Every time I try and send an iMessage, it will only send text messages.
I've tried resetting the Network Settings, resetting all of my settings,
signing out and signing into my apple ID in various places including the iMessage section,
I've tried updating my phone to iOS 9.0.1,
I've tried backing up and restoring my phone (so a complete wipe and restore)
and none of these things have worked... The only time it remotely worked was when I completely reloaded the software to iOS 9.0.1 and I was able to send 1 iMessage and then it went back to only sending texts.
Any solutions?
iPhone 6s Plus, iOS 9.0.1