I plan on using a 6s Plus coming from Android. 1. I have all of my contacts saved to my gmail, and I know iOS deals with iCloud accounts. If I setup my gmail, will my contacts be uploaded automatically? Will I be able to save new contacts to gmail or is it iCloud by default? 2. I want to keep my whatsapp chats, groups and media. They are backed up daily to a gmail account. Will I be able to retrieve everything on the iPhone? I heard/read that whatsapp backups are not interchangeable or something. Thanks.