Logging in to Zoom on a phone

When I log into Zoom on my phone, it requires a verification code that is sent to my email. Getting the code means I have to minimize that tab and switch over to email. Supposedly the code is valid for 10 minutes, but Zoom starts counting down from 1 minute to zero. When I enter the code, Zoom rejects it as invalid. So I have to start over. Last time I needed to attend a meeting using my phone, it took 3 attempts to log in, and I was late for the meeting.  Does anyone have a solution?  Customer support doesn't seem interested in direct contacts....