Why can’t I add more than one number? – Textone Second Phone Number Review

Update: HELP! I would like to add another line to my account. I have more than 5,000 credits, but don’t see an option to do this without disabling my current number. I thought it was possible to have up to three different numbers on LinePlus/TextOne. Can you provide some advice on how to do this? Thank you. Original Review: Five Stars! ? I had been looking for a replacement to Sideline since that app switched to a forced subscription model. TextOne blows the competition out of the water and is really free!
Review by Island Life on Textone Second Phone Number.