I need to switch my wife's old PAYG Moto G3 phone, which has no space/faulty memory, for a new Nokia 5.3 but don't know how. I'd like to do a full back-up of all data (or at least contacts) to PC, then restore all data to the Nokia if possible. I've seen plenty of free software for backup/transfer, but I'm unsure what to use. Because of the memory problem with the Moto G3 it's unlikely that any other apps can be downloaded (I already had to uninstall Facebook). Can anyone help please?