I clicked for a trial... after a while I entered my phone, received an SMS, and no indication of what to do with the code I received. No place to enter the code

I clicked for a trial... after a while I entered my phone, received an SMS, and no indication of what to do with the code I received. No place to enter the code in the web page, nothing. Second attempt, and I got a place to put the code. Then, while I was filling up the registration data, the page refreshed and started all over. Third attempt finally worked... Not the best on-boarding experience, but hey it really is cheap!