Who I have the same questioned this topic

It is now March of 2020 and my wife and I have both been having connectivity issues with our 6s's that we've never had before.  We always use 3G as the battery lasts longer.  Calls sound terrible, texts often won't go through for hours and then we get all of them at once, sometimes iMessages will send, sometimes they send as regular txt messages.  All of this can happen at any bar level.

When we switch to 4G in our area, internet is SO slow.  Can't get anything done.  So we just stay on 3G.  It usually works.  But with disappointing results.