This might be a stupid question but does this mean that if I have a phone emulator and configure it to have some number and download one of these apps that use

This might be a stupid question but does this mean that if I have a phone emulator and configure it to have some number and download one of these apps that use the # for account lookup that I could essentially hijack peoples accounts like this? EDIT: no that doesn't seem to be the case. When you login to Lyft they send a text to the registered number.