Can I switch from GoFi Prepaid Plan to Lifetime Prepaid Plan?

Yes. You can make a switch at your Personal Account. Go to Lines> More Details option at your Line’s managing panel> Switch Plan. Please keep in mind that when you switch a line to the Lifetime Prepaid  Plan your GoFi Prepaid Plan data does not transfer over. Your Line will be automatically refilled with 1GB of data according to the prices specified.