Having a very unusual issue that's been going on for a few months. On 4G (EE) video and photo messages don't open. I receive the notification, the blurred image is there but doesn't download. But on WiFi no issues. I've been checking online for a solution usually reset network settings, or check whatsapp is able to use mobile data and both are enabled. Did a full reset and reinstalled whatsapp all with same result. I have taken to both EE and Apple and both say the phone and the signal is fine (although did send a new SIM with same issues). So any ideas what steps to take next?