Transfer Contacts to Samsung Galaxy A21s
You can transfer contacts to Samsung Galaxy A21s (between your SIM card and Samsung phone or between your Google account and Samsung phone). This way, you will not lose your contacts if you change your SIM card or Samsung Galaxy A21s phone. If you copy contacts to your Google account, you will not lose your contacts even you lose your phone or your phone is stolen.
Transfer Contacts from SIM Card to Your Phone / Google Account

1 – Tap “Contacts” option from menu.

2 – Select menu icon (three line).

3 – Touch “Manage contacts” from options on your Samsung Galaxy A21s.

4 – Select “Import/Export contacts” on this screen.

5 – Tap “Import” option to transfer contacts from your SIM card to your phone or Google account.

6 – Select “SIM 1” on the next screen.

7 – The SIM card contacts will be displayed. Tap “All” option.

8 – Tap “Done” option after selecting contacts on your Samsung Galaxy A21s phone.

9 – Decide where you want to save. Save contacts to your phone or Google account.

10 – Touch “Import” option after decide where to save.

Transfer Contacts from SIM Card to Samsung Galaxy A21s / Google Account
1 – Tap “Contacts” option from menu.

2 – Select menu icon (three line) on Samsung Galaxy A21s.

3 – Touch “Manage contacts” from options.

4 – Select “Import/Export contacts” on this screen.

5 – Tap “Export” option to transfer contacts from your phone or Google account to your SIM card.

6 – Select “SIM 1” option on Samsung Galaxy A21s.

7 – Tap “Done” option after selecting contacts.

8 – Tap “Export” option on this screen.

9 – Tap “OK”.

That’s all.