I've had Verizon for a very long time.....ran the iPhone 6s and the iPhone 8 now. Both of these phones I am able to get data while on a phone call after adjusting my settings as needed. If I am not mistaken I adjusted my wife's settings back when she had a 6 for this option as well. I can surf and text while on speaker with no issues, spend photos, uploads etc. I think you need to look into the settings again.