While backing-up the contacts on your smartphone to a SIM card is a great way to ensure you don't lose names, numbers and emails if your handset has to be wiped, it doesn't protect you if you lose the phone itself.
Keep a copy of your contacts just in case you lose your handset
With this in mind, it's worth considering backing up your contacts to a separate memory card so if you are unfortunate enough to lose your smartphone, you'll have a record of all the names and numbers you need. Here's how to do it on a Google Android device.
Insert a memory card into your phone. If you already have a memory card inserted into your handset, remove it and use a different memory card, so if you lose the phone you'll still have a record of your contacts.
From the home screen select Contacts and then press the Menu button and choose More.
From the options displayed, select Import/export.
Now choose Export to memory card. You'll be asked to confirm you want to export your contact list. Click Ok and your contacts will be backed-up to the memory card inserted into your phone. Now remove the memory card and keep it somewhere safe!