Can I Use An Authenticator App If My Phone Is Not Connected To Cell Service? May 14, 2024 19:55 Updated Yes, authenticator apps are accessible offline as well. Related articles What Type Of 2FA Is Available? What If My Mobile Device Is Lost Or Stolen? My CenturyLink Account is Suspended or Not Working How to Upgrade from a Free Account Create a New CenturyLink Email Address: A Step-by-Step Guide