reminders app not working with ios 12

There was a warning when you were invited to hit the Upgrade button in Reminders. You must have a mac with Catalina or another phone or ipad on ios13 yes?

Reminders themselves have now been converted by one of them.

Its not the old app you need it is the new app and that only runs on iphone 6S and later.

https://support.apple.com/en-us/HT210220

Once Reminders have been converted to ios13 or Catalina on one device then all your devices must be at that level.

So your iphone 6 will never be able to use your Reminders now.

There was a warning.

merle81 wrote:

Thanks. When I bought the phone I was told it was a 6s but when I go to the setting info it says it is only a 6. Oh well.

Then return it, get your money back, and go buy something else. The seller lied.