Don't Wait If You Find Something You Like
If you find something you really like between now and September/October don't let the rumored iPhone models hold you back.
Nowadays most carrier plans allow you to upgrade to a new device after a year when you trade in your phone. So if you were to buy a new device right now you'd be able to pick up a 2020 iPhone a few months after their launch in the fall.
There are a lot of great devices on shelves right now. We've already gone through Apple's iPhone lineup, but you'll also want to take a long look at the Galaxy S20 series, Galaxy Note 10, Galaxy S10, Galaxy Note 9, Galaxy S9, OnePlus 7, and Google's Pixel 3 and Pixel 4.
Make sure you dig into these devices before you decide to wait. If you find something that suits your needs at the right price, don't be afraid to buy something right now.