Hope this helps: I've been frustrated with this for days and tried everything... thank god I had a back up of I would have lost all my contacts.
This is what you shall do (apologies to Walt Whitman, Leaves of Grass introduction...)
All contacts must be saved as Google... in the Email settings there is a choice to save to phone or sim or google and if they are not saved to google they do not sync.
It seems they also have to be assigned to My Contacts or some other group... if not assigned that are taken off the google account on the web.
it means if you want a copy of everything on your web google account you will have to re-enter them. And that I am not doing tonight.
It's all fun isn't it. Do you think the people who write these programs actually use them?
Here is the full Walt Whitman intro I refer to if you are interested... if we did as he suggests there might not be any more wars... now that's a thought... it's all in one sentence so take a breath before you start but you will be pretty amazed when you get to the last few phrases... look for the "lashes" bit.
This is what you shall do; Love the earth and sun and the animals, despise riches, give alms to every one that asks, stand up for the stupid and crazy, devote your income and labor to others, hate tyrants, argue not concerning God, have patience and indulgence toward the people, take off your hat to nothing known or unknown or to any man or number of men, go freely with powerful uneducated persons and with the young and with the mothers of families, read these leaves in the open air every season of every year of your life, re-examine all you have been told at school or church or in any book, dismiss whatever insults your own soul, and your very flesh shall be a great poem and have the richest fluency not only in its words but in the silent lines of its lips and face and between the lashes of your eyes and in every motion and joint of your body.
?Walt Whitman, from the preface of Leaves of Grass.