When entering your phone number on the Bitcoin ATM, there is a chance that the machine will ask you to text start to a phone number. This phone number belongs to our partner that issues our one-time passcodes, if you previously texted "Stop" to this phone number you will need to activate this service to your phone number again by texting "Start" to this phone number.
How to Fix:
The only known way to fix this issue is to send a text that reads "Start" to the phone number listed on the screen.
If this does not work, please Contact Our Support Team