Open "Contacts" app : - tap on , - tap on "Settings", - tap on "Import", - tap on "SIM card", - select a SIM card, if needed and tap on OK, - "Save to" : select "Device", (according to the smartphone model, this option is not displayed),* - tap on "Import" or on to launch contacts importation.
NB : The contacts list is fully backed up. It is possible to select one by one contacts to import.