You can still create a Dual Camera Snap, even if your device doesn’t currently support simultaneous front and back recording. 

To create a Dual Camera Snap…

1. Open the Camera screen
2. Tap the Dual Camera icon in the Camera toolbar 
3. You’ll be prompted to take your first of two photo or video Snaps ("Step 1 of 2")
4. Pick a layout for your Dual Camera Snap
5. Take a photo or video Snap for the second portion of your Dual Camera Snap ("Step 2 of 2")
6. Edit, save, and send your Dual Camera Snap!