Keep iPhone 6 or switch to iPhone X or 8
iPhone 8 64GB: $199 + $60/month (2gb data) on a 24 month tab
iPhone X 64GB: $599 + $60/month (2gb data) on a 24 month tab
2gb should be enough for my usage, but I do not have many complaints with my iPhone 6 that I've been using for 2.5 years. I'm not sure if it's time to upgrade or if it's not worth the extra investment of ~$700 (for iphone 8) or ~$1100 (for iphone X) over the next two years. I have a few days to decide.