Can I use different types of device for authentication (e.g. mobile phone and tablet)?

Yes. You can use different devices or different types of device for two-factor authentication. However, an authentication app linked to an EPO account can only be linked from one device at a time. 

For example, you can use Google Authenticator on one mobile phone, and use Okta Verify on another phone. 

Or you can use the code sent by text message (SMS) to your mobile phone or landline, and use emails accessed on your tablet.