text message
Why am I only getting text messages from people who have apple products
iPad Air, iOS 9.3.4
Because iMessage only works with Apple products.
SMS is only available if you have iPad associated with your iPhone.
Read here:
With Continuity, you can also send and receive SMS and MMS messages in the Messages app on other iOS devices (with iOS 8) or a Mac (with OS X Yosemite), if you are signed in to iMessage with the same Apple ID as on your iPhone. See About Continuity features.