How to merge Contacts on all devices and iCloud?
Greetings All,
My Contacts lists appear to be different on my Mac (MacBook Pro, Mid 2010 w/ MacOS 10.13.6) and my iCloud. On my Mac the Contacts lists "All iCloud" and "All on My Mac" do not contain the same contacts and I would like to make it so they both contain all of my contacts. I use an old iPhone (3GS, jailbroken) which has my most up-to-date contact list, but this iPhone is not connected to my iCloud. I don't believe this iPhone could be connected to my iCloud even if I wanted it to be(?). I connect and sync the iPhone to iTunes on my Mac once a month or so to back up the contact information. Does this sync process copy my iPhone contact information to the Contacts app on my Mac? I also use an iPad Pro 10.5 w/ iPadOS 14.6. The iPad is connected to my iCloud. How do I merge all of my contact information so Contacts on my iPhone, Mac, iPad, and my iCloud are up to date and contain all of the same contacts?
Also: I will be retiring the iPhone 3GS in the near future and I plan to begin using an iPhone SE (1st generation) at that time. I would like to make sure all of my Contacts issues are resolved before I make this switch, so I can make a fresh start with the iPhone SE and have all of my Contacts available on it. Will it be best to restore the iPhone information from iTunes on my Mac to the new iPhone or will it be best to manage this via iCloud? Or both? Please advise on this process as well.
Thank you for your help and support. All much appreciated!
Best regards,
iPhone SE