A recent EEC approval filing revealed that Apple could be preparing to launch a slew of unannounced mobile devices and one of these could be the iPhone SE 2. No specific hardware specs were revealed in the EEC file, but the iPhone SE 2 could come with the A10 Fusion SoC coupled with 2 GB of RAM, up to 128 GB storage and improved cameras, plus the latest iOS 11 version, but would still retain the 4-inch display found on the original model.
https://www.notebookcheck.net/Apple-iPhone-SE-2-could-be-announced-soon.299854.0.html