A knowledge base article about I left my phone/hardware token at home and can't 2-Step. What now? provided by the UC Berkeley IT Service Hub - Knowledge Portal
Did you set up a second device or print out backup passcodes? (Please find more information on bypass codes through the 2-step page.
If so, use those for 2-Step Verification. If not, contact calnet2-stephelp@berkeley.edu for assistance.