a friend of mine has an iPhone 3GS and is swtiching to an iPhone 4S. Now, she's tried to backup all her WhatsApp chats using the WhatsApp backup, but it gets stuck. So I'm thinking whether iTunes backup may do that too.
I know iTunes backups everything on your iPhone, so if those chats are on her iPhone it should work, isn't it?
So should I connect the iPhone to a PC/Mac and start an iTunes backup? Would that work to get the chats back when I'll restore the backup in the 'new' iPhone?